A niece is a sister’s best friend. She is like a daughter, a friend and a sister rolled into one. This means that nieces are exceptionally special. We have written the best Happy 21st Birthday Niece Quotes to celebrate your niece’s most memorable moments.
Happy 21st Birthday Niece Quotes
I’m seeing my niece today! She’s 21 yrs old now. I’m going to get her a car because she doesn’t have one yet. #Happy21stBirthdayNiece
Hoping that all of your birthday dreams and wishes come true. Happy 21st Birthday Niece.
Happy 21st birthday Niece, wishing you the happiest year of your life.
Congrats on your 21st birthday. Have a blessed year ahead.
Keep shining because you can make it to your 21st birthday and beyond. We’re so proud of you and so excited for your future. ❤
Thank you for always showing me what it means to have fun. Wishing you an amazing 21st birthday.
At 21, she’s a powerhouse. At 41, she still gets carded. Happy birthday to the ambitious and fun-loving niece who always has her finger on the pulse of what’s new and cool.
Thank you for inspiring all of us to be a bit brighter, a little bolder, and all-around better versions of ourselves. Happy Birthday, Niece!
You make the best memories happen. May your day be just as sweet as you are. Have a great birthday!
Cheers to one more year of adventures, accomplishments, and lots of trips around the sun. Here’s to another year with you in it! happy 21st birthday niece.
Today you are but a whisper, tomorrow you’ll be forever in our hearts. Happy Birthday, Niece!
Happy birthday, Niece! We want you to enjoy every minute of this special day. 21 years old! Wow, the future is looking bright for you!
You are a gift to the world, and we’re so glad you were born. cheers to your 21st! 🍾
Happy birthday to our kooky, wacky, wonderful niece. You’re the most hilarious and sweetest thing that’s happened to us all year. Wishing you love, warmth, and laughter this day forward, little one.
Our sweetest 21st birthday shouts out to you. We are so lucky to call you ours, @jennystanton1
Hey there. Happy Birthday! You’ve reached me, your favorite Niece! I hope you are having a blast.
HBD to my gorgeous, talented, smart & unbelievably funny niece! Can’t wait to celebrate @lisazalesh !!
We wish you a happy #Sweet21 and hope your day will be filled with love and laughter.
I’m so happy to spend this day with you. I wish that you can always be happy and healthy, Have a great life!
Wishing the happiest of birthdays to this ray of sunshine.
Feel lucky that your eyes are as big and as bright as this new year. We ♥️ you!
Turn those into the perfect soundtracks for dancing. Happy 21st birthday, niece!
Happy 21st birthday to my amazing niece! 21 is a milestone, and you are awesome. I love you!
I would have never made it through law school without you, but my first year as a lawyer is going to be a breeze. I love you, niece! Happy birthday!
Happiest to the coolest, most hardworking, awesome niece ever! You motivate me every day to be a better version of myself.
Turning 21 is a big deal. You’re officially on the right side of the law and can get whatever you want whenever you want it. Here’s to another great year!
The most exciting years of your life. Happy birthday.
We’re so happy you guys are coming to celebrate with us and we can’t wait to see you soon!
May the week ahead be filled with all your dreams. Happy Birthday.
Congratulations to a young woman who’s become an unstoppable force—and our great-niece.
And food, too? Wow! Most adults don’t eat that much in a week. Happy 21st Birthday Niece
Happy 21st Birthday to my amazing niece. Here’s to all the wonderful and exciting times ahead! Love you!
Happy 21st birthday wishes to you, my dear niece.
It’s a big one today. Happy 21st birthday to my niece!
Happy 21st birthday! Wishing you love, laughter, and lots of good food.
The time is always right to be AWESOME! Happy birthday, niece.
Happy Birthday to the most wonderful niece, may you continue to be You, from your funniest friend, who is always here for you if needed. Let’s celebrate!
Wishing the happiest of birthdays to my sis @melbeth! Hope you’re having an incredible day!
HAPPY 21ST BIRTHDAY NIECE! Wishing you the best summer of your life.
Wishing the most popular niece a very happy 21st birthday…
Happy 21st Birthday to my niece, I hope that you get everything that your heart desires. Here’s to many more birthdays of laughter and love.
21 years young and gorgeous as ever. We love you! #HappyBirthdayNiece
Happy 21st birthday to our favorite foodie niece!
Hey niece! I got you some peanuts and Cracker Jack to celebrate your big 21st birthday. Congrats and happy birthday!
Happy 21st birthday to the smartest, funniest, and most beautiful girl I know. We’re so lucky to have you. Love you to the moon and back.
You’re the anchor that grounds me, the mirror that reflects me, and the best friend I could ask for. You are the biggest blessing in my life. Happy Birthday, Niece.
We are excited to celebrate your 21st with you! All of us @celebrate_21, guarantee you the best birthday yet!
You’ve always been there ❤️ Happy birthday and cheers to 21 more.
Looking forward to celebrating your special day with you! Love.
With age comes wisdom, but not at the same time. Your uncle’s going to need a few of these laughs before you’re over 21. Happy Birthday!
Happy Birthday! You’re one year closer to being 21 again. Happy 21st birthday niece.
Happy 21st birthday, niece! Remember to drink delicious bubbly and laugh a lot tonight.
Things won’t always go the way you want them to, but that’s OK. The only thing you can control is your attitude about it, and I choose to be happy joking around with my friends on my 21st birthday today! Happy Birthday Niece from Uncle
A heart as big as yours deserves the best birthday celebration ever. Happy 21st birthday!
What better way to celebrate the birthday of a grown-up niece than with a chic, sophisticated gift that speaks directly to the woman she’s becoming.
Happy Birthday to a classy, fun, and adventurous woman who always keeps an open mind and an open heart—Hope you have the best 21st birthday!
We know you’re going to be celebrating like a boss, so cheers to a great birthday.
Happy birthday, to the brightest star in my life. I hope your day is full of magic.
Happy 21st birthday to our niece! You’re a shining star in the family, and we’re so grateful for you.
Happy 21st Birthday to my niece you’re a beautiful young woman and I’m proud to be your aunt!
High fiving the next phase. Happy 21st birthday to our powerhouse of a niece.
Happy 21st birthday! May all your wishes come true.
You are always one of my favorite people to see on your special day. I can’t wait to celebrate with you!
Here’s to never growing up. Happy birthday, niece. I hope it’s magical and full of good times with friends. You’re my second favorite kid and sis of the year.
Happy 21st birthday, my niece! Here’s to the next 21 years of adventure and memories.
Happy 21st birthday to this wonderful niece. May the next chapter of your life be full of adventure and joy.
Happy birthday to the greatest niece in the world! May all your 21st wishes come true
Happy 21st birthday, niece! Many happy returns of the day to you and all your new adventures in #21.
Celebrating my niece’s 21st with a beautiful fragrance from @TiffanyandCo. May you shine bright always.
When your niece does this, you know the family genes are strong.
With a great deal of pleasure, we’re blowing out 21 candles for your birthday.
When it comes to picking out the perfect gift, don’t let her birthday choice overwhelm you. Help us help you.
Happy 21st birthday to the best niece a person could ask for. Have an amazing day!
Happy 21st Birthday to my niece. Hope you have a great year!
21 years is about so much more than # of years. It’s about seeing the person you love grow and change and become the best version of themselves. Happy 21st!
You are my sunshine @fiona_charlotte21. Thanks for inviting me to be part of your 21st! My gift to you is spending more time with your best buddy, Nana, and of course taking you out on the town to sing it loud and proud—in honor of your boozy birthday. Happy 21st birthday, niece! I love you.
Wishing you a year of personal and professional fulfillment. #HappyBirthdayNiece
congratulations as you venture into yet another year of your life. Wishing you all the best and lots of love on this special day.
Happy birthday to my niece! You’re the most wonderful person I’ve ever known. I couldn’t ask for a better sister, and of course, I couldn’t ask for a better niece.
Happy 21st birthday to my sweet niece. I’m beyond proud of the woman you’ve become, and can’t wait to see your amazing future unfold.
We’re about to go live so I just wanted to say Happy 21st birthday to the coolest niece in the world @alexandriazambrano
Happy 21st Birthday to our beloved niece! Congratulations!
Happy birthday to my amazing niece! You’re so beautiful, smart, and kind!
I’ll see you on the dance floor or at the bar, I’ll show up to your 21st with a bouquet of wine glasses and wildflowers.
Celebrating a birthday with your family and friends is a big milestone in your life.
Happy Birthday to one of the most driven, independent, and hard-working youngsters I know. I believe we can make it do that thing where it rhymes? Love you! Niece.
It’s your 21st milestone, a memorable day. We love you, Happy 21st Birthday Niece.
Happy 21st birthday to the coolest niece ever! We’re so lucky to have you in our lives, and we love you to infinity and beyond!
You’re Always the Coolest— Especially on Your Birthday! I hope you have an amazing birthday party, a fall full of good times, and love from all your nearest & dearest. Happy 21st bday!
We are family. We are 21. Celebrate this milestone twice as much.
Happy Birthday to one of our favorite people—we’re so excited to celebrate your 21st with you.
And for her 21st, she chose fun and flirty fuchsia and teal color palette that’s bound to turn heads and bring joy to everyone who attends the party.
Happy birthday! We miss you so much! Hope this birthday brings you lots of joyous occasions.
If you’re feeling anything less than completely blissed out on your birthday, then you’re not doing it right. Have an epic day, my niece!
Salute to all the hardworking, smart, and driven Women celebrating a milestone birthday today. We salute you.
I don’t know how to thank you for all that you are and all that you do… You fill my heart with so much love and pride, I can no longer count the ways. Happy Birthday!
Thank you for reaching this milestone! You have brought us many joys throughout the years and will continue to do so.
What happens in Vegas, stays in Vegas. But your nails? Well, they’re never going to forget that trip to Sin City. Happy 21st Birthday Niece!
We can’t wait to celebrate with you on your 21st birthday and wish you a happy 21st birthday!
Happy 21st birthday hope you will get success and good health always from all sides.
From celebrating #nationalnieceday and attending @thecirqueitalia’s Amaluna, my niece’s 21st birthday has been quite eventful.
We’re always happy to celebrate special occasions with you and always keep the good times rolling: Here’s to 21 more.
Happy Birthday to the coolest, most motivated, best-dressed young woman I know. You make me proud every day. Have an amazing year!
Happy happy birthday to the girl who always keeps us on our toes. Stay funky, niece.
Happy 21st Birthday Niece
I’m so proud of everything you have already achieved in your life! I get excited to see everything you will do next if every year that passes, you are always changing and growing in new ways. happy 21st birthday niece
HAPPY 21ST BIRTHDAY NIECE! You’re the most incredible young woman to walk the planet.
Happy 21st Birthday to my sweet niece! I hope your day is over the top fantastic. You are a joy and I’m so grateful you’re in our lives.
Happy 21st birthday to our niece! We know you’re going to achieve great things.
We are happy to celebrate the 21st birthday of our niece. From the bottom of our hearts, we wish this incredible person a life filled with love and happiness.
Happy birthday to our niece! ♥️ We hope your day brings you everything good, and that you stay cool on this hot day. Happy 21st Birthday
Congrats on your 21st birthday, Niece Wishing you a lifetime of good health and happiness.
Wishing my amazingly talented and creative niece @katie_hernandez a gorgeous and fabulous 21st birthday. May all your dreams come true. #HappyBirthday
Happy 21st Birthday and congratulations on always being yourself. I wouldn’t want you to be anyone else.
Happy 21st Birthday, niece! Enjoy your special day and celebrate with family and friends.
You are so loved and adored—now and always. Happy 21st Birthday Niece.
Here’s to you, sweet niece! We love you to the moon and back. Happy 21st Birthday.
So many more reasons to celebrate you on your 21st birthday. We are so proud of you!
Congratulations, @ niece_name ! No fairy tale could compare to your 21st birthday.
You’re already so wise and so much your person that I don’t need to tell you how to live your life. But I will always be grateful for the way you are always the best, most loving version of yourself. Happy 21st birthday.
Celebrating the birthday of – your 21st birthday is reached on the day you were born. It’s a time for celebrating with family and friends. We are so proud of you and wish you all the best in this new chapter of your life!
You’ve come such a long way these last 21 years. Hope you have an amazing year.
Happy 21st Birthday to my favorite niece, A. You are a strong, beautiful, funny, talented young lady with a heart of gold. I love you so much and appreciate all that you have done for me over the years.
Happy 21st Birthday to our dear niece, who’s growing up fast! Here’s to the day and nights ahead that will be jam-packed with excitement, new faces, and unforgettable moments. Wishing you all the best as you celebrate this exciting time.
Happy 21st birthday to our favorite niece! We love you! (featured picture of the niece)
Happy 21st Birthday to our niece, we love you so much and are proud of the beautiful woman that you are!
The best is yet to come. Happy 21st birthday to our darling niece.
Wishing my beautiful niece @mynameisnina a special 21st birthday today! So, so proud of everything you’ve done and the woman you’re becoming. You inspire me so much.
Watching my little niece grow from a baby girl into an amazing, talented woman has been the best gift I’ve ever received. Congratulations on your 21st birthday and many more to come!
Happy 21st Birthday Niece Funny
Happy 21st Birthday to my niece! You have grown so much in the last 2 decades and I’m looking forward to seeing what life has in store for you.
I know that you will continue to grow, mature, and show the world who you are in a way that only you can, Happy birthday niece
Sending you lots of love & wishing you a very Happy 21st Birthday!
Congratulations on your 21st birthday! Hope all your dreams come true.
What a journey you’ve been on—never forget we’ll always be cheering for
you, in front and behind the scenes, to keep marching forward. Love you and Happy Birthday!
Happy 21st Birthday to our favorite niece! We wish you all the best in life. Look forward to us spoiling you tonight Love you.
Hope you’re having an incredible time turning 21! #HappyBirthdayNiece
Happy 21st birthday to my Niece’s beautiful baby girl. You make our family so blessed. Love from one niece to another.
21st birthday wishes to a niece who shared her 21st at the same restaurant she first dined at as a toddler. Happy Birthday!
Happy 21st birthday to the kindest, bubbly, and beautiful girl. We love you so much and hope your day is spectacular.
Congratulations to my niece on her 21st birthday Happy Birthday.
Wishing you happiness, laughter, and love this 21st birthday and for many years to come.
Don’t worry about anything, worry is useless and will make you gray. Happy Birthday, Love Niece!
Celebrating 21 years of beauty, intelligence, and strength. Happy Birthday @amandacummings
Wishing the most special niece in the world a truly wonderful birthday. Wish you all the happiness in the world.
Birthdays are the best excuse to celebrate how awesome you’ve become. *HBD, niece*!
Congrats on yet another milestone in your beautiful life. We love you to the moon and back.
We’re so proud of our little girl becoming a magical woman!
Here’s to happiness and health, love and cheer, a loving family joined by shared memories. Happy 21st Birthday Niece!
Happy 21st birthday to my niece! Wishing you health, wealth, and happiness for your next year.
Happy 21st birthday to our beautiful niece! We love you. So many good wishes for your future, may it be filled with happiness, love, and success. Wishing you all the best for everything that is to come.
Happy 21st birthday to our lovely niece. She is the most caring and sweet soul!
Happy 21st birthday to the brightest niece in the universe!
Happy 21st Birthday! Welcome to the grown-up experience.
Throw your hands up in the air and make some noise for my favorite niece who’s turning 21 today!
On your 21st birthday, we hope you will begin a journey of new adventures with the security and support of knowing we are always here for you. Much love
Happy Birthday, Niece! May all of your wishes come true.