30 Fab 21st Birthday Party Themes To Die For!

by Jillian Leslie on

Turning 21 is such an important milestone in everyone's life that it deserves to be celebrated in the most memorable way. Check out all our 30 fab 21st birthday party trends to help you pick the perfect one for you.

I'm guessing all your friends are turning 21 too, so finding a unique party theme can be a bit of a challenge. We've got your back though with so many ideas you'll be wanting to celebrate your 21st more than once!

30 Fab 21st Birthday Party Trends To Die For!

Check out all the cool ideas we've rounded up for you to celebrate a 21st birthday in style! We've so many gorgeous themes ranging from glam parties to casino-themed 21st, and many many more... Enjoy!

30 Fab 21st Birthday Party Themes To Die For!

1. Boho Picnic 21st Birthday Parties

There are so many fun 21st birthday party themes to choose from that is can be a little overwhelming picking the right one when celebrating such a special occasion.

Boho picnic parties are incredibly popular at the moment. There's something very intimate about this laidback and whimsical party theme which is probably the secret to why it's such a crowd-pleaser.

Don't forget to lay out as many floor cushions as you can to create an informal ambiance.

Boho Picnic 21st Birthday Parties

2. Fashionista 21st Birthday Parties

If you live for style and everything fashion, a fashionista-themed 21st birthday celebration is perfect for you.

Pick your favorite fashion brand and design your party around that theme.

Whatever you choose, make sure it oozes class and sophistication!

Fashionista 21st Birthday Parties

3. Disco 21st Birthday Parties

Hitting the dance floor is another fun way to celebrate such an important date with family and friends.

What could be more fun than dancing the night away to everyone's favorite tracks, right?

Either hire a DJ, or make your own playlist on a streaming service like Apple Music, Spotify, and Pandora, and create plenty of room for an unforgettable night.

Disco 21st Birthday Parties

4. Brunch 21st Birthday Parties

A champagne breakfast or brunch is undoubtedly one of my favorite 21st birthday party ideas.

It's so much fun to be able to mix and mingle with your guests while helping yourself to delicious food and sipping on champagne.

You don't get much better than that!

Brunch 21st Birthday Parties

5. Tea Party 21st Birthday Parties

Teatime, anyone? Get out your finest china and treat your guests to an afternoon tea party with all the trimmings.

Serve pretty little sandwiches, sweet pastries, and of course... lots of tea!

Decorate with fancy accessories such as pearl jewelry, floral arrangements, romance novels, and other charming touches.

Tea Party 21st Birthday Parties

6. Pool Party 21st Birthday

If you are throwing your birthday party during the summer, how about making the most of the good weather and treating your guests to a fab pool party?

A pool is the best place to cool off during the summer, especially if you've got a cocktail in your hand!

Liven up your party with great music, bright colors, Tiki torches, and a bunch of fun inflatables, that you can use as cool photo booth props.

If, on the other hand, the weather isn't up to it, you could always consider throwing an indoor pool party instead.

Pool 21st Birthday Parties


7. Retro 21st Birthday Parties

Take a trip down memory lane and throw an old-school retro-themed party for your 21st.

There's so much fun to be had at an awesome throwback to the '70s, '80s, '90s, and '00s.

The birthday cake at all themed parties should take center stage, so create a retro showstopper by decorating with a bunch of cool items from that decade.

Retro 21st Birthday Parties

8. All White 21st Birthday Parties

There's something so effortless and classy about hosting an all-white-themed 21st birthday party.

Whether you decide to throw your party indoors or make it an alfresco affair, be rest assured that your all-white party decorations are guaranteed to add elegance to your celebration.

Don't forget to let your guests know about the white theme dress code on your 21st birthday invitations.

All White 21st Birthday Parties

9. TikTok 21st Birthday Parties

TikTok is a massive hit on social media and a worldwide phenomenon, so if you love spending hours glued to your phone a TikTok-themed 21st birthday is a great choice!

Make sure to decorate with sparkly backdrops and balloons that you can use as backdrops for your videos.

TikTok 21st Birthday Parties

10. Hollywood Movie Night 21st Birthday

Create a memorable evening by making your guests feel like movie stars with a Hollywood-themed 21st birthday party. It's a great theme if you love movies and wish to relive the glory of early Hollywood.

Roll out the red carpet and treat your guests to a night full of glitzy and glamour!

Hollywood Movie Night 21st Birthday

11. Spa-Themed 21st Birthday Parties

Kick back and relax while celebrating your 21st with a spa day with your close friends.

Everyone is going to love this self-indulgent party theme with manicures, facials and massages, and of course, lots of laughs!

Spa-Themed 21st Birthday Parties

12. Fiesta 21st Birthday Parties

Another fabulous 21st birthday party theme that is full of bright colours, great food and refreshing Mexican cocktails is a fiesta-themed party!

If you can't resist a one then how about throwing a Mexican fiesta to mark the special occasion with lots of tasty tacos and delicious margaritas?

Fiesta 21st Birthday Parties

13. Rustic 21st Birthday Parties

Everyone is going to jump at the opportunity to wish you a happy birthday and share your big day with you.

Rustic floral parties are really popular and are such a beautiful party theme for a 21st birthday!

If you love flowers and would love nothing more than to decorate you party with as many of them as you can, then why not pick your favourite one and use that as the theme for your celebration?

Rustic 21st Birthday Parties

14. Coachella 21st Birthday Parties

There are so many amazing 21st birthday ideas to choose from that it can sometimes be hard to pick just one.

If you love a festivals and great music this next party theme is going to blow you away!

Treat your guests to the ultimate birthday festival by throwing an unforgettable Coachella-themed party in your backyard.

Decorate with rugs, pillows, teepees, dream catchers, feathers, balloons and even have a food truck or two serving food and drinks.

Coacherella 21st Birthday Parties

15. Champagne 21st Birthday Parties

Crack open the bubbly and celebrate this important milestone in your life with a champagne themed 21st birthday party!

It's a great 21st birthday party idea that all your family members and friends will enjoy.

Be sure to serve elegant party snacks and some fancy appetisers for your guests to nibble on.

Champagne 21st Birthday Parties

16. Masquerade 21st Birthday Parties

Add some mystique to your birthday celebrations by throwing a sophisticated masquerade-themed party.

Who doesn't love an escuse to get all dress up to party the night away?

Decorations really set the mood so make sure you use both chandeliers, candelabras, feathers and Venetian artisan masks to recreate your very own Venetian Ball.

Masquerade 21st Birthday Parties

17. Great Gatsby 21st Birthday Parties

Planning a party can be so thrilling, especially a themed one like a Great Gatsby party!

Inspired on F. Scot Fitzgerald's book, a Great Gatsby-themed party is a great excuse to throw a lavish and extravagant 21st birthday celebration.

Again, make sure you let everyone know what the dress code is.

Great Gatsby 21st Birthday Parties

18. Glam 21st Birthday Parties

There's something so heartwarming about having all your friends and family around you to celebrate your big day.

Like any birthday girl, you deserve a party to remember with lots of glitz and glamor, and of course lots of champagne.

Host a black-tie affair and decorate in as much sparkle and gold as you can.

Glam 21st Birthday Parties

19. Hotel Retreat 21st Birthday Parties

If you are looking for a unique 21st birthday party idea, look no further.

A great way to celebrate a milestone birthday is by going away a couple of nights away with your closest friends.

Book a couple of rooms in a nice hotel, and have the time of your life ordering room service and getting pampered.

All while sipping cocktails, or course!

Hotel Retreat 21st Birthday Parties

20. Football 21st Birthday Parties

Figuring out the best theme for a birthday boys 21st birthday can be tricky.

If he's a massive football fan, how about throwing him a football party to remember?

Serve a bunch of tasty game-day food and lots of beer, and he and his guests will be more than happy.

Better still if its game night you couldn't wish for a more perfect time to put up a big screen and treat your guests to an amazing experience!

Football 21st Birthday Parties

21. BBQ 21st Birthday Parties

You don't have to throw a huge party to have a memorable birthday.

Sometimes, the more laidback and easy going a party is, the more you enjoy your self which is why, if the weather allows, you could throw a BBQ for your family and friends.

There's nothing like a delicious BBQ, refreshing drinks and great music to make your 21st birthday one for the ages.

BBQ 21st Birthday Parties

22. Beer 21st Birthday Parties

Another thing men love and that's a great party theme is beer!

Throw him a tasting party with all his buddies with a bunch of different types of beer and some snacks.

For an unforgettable party make sure you include a bunch of fun party games too!

Beer 21st Birthday Parties

23. Bar / Club 21st Birthday

One of the best ways to spend your 21st would have to be in a bar or club, with your close friends, dancing and drinking the night away!

A good time is guaranteed so be sure to dress up and get ready to have the time of your life! 

Bar / Club 21st Birthday Parties

24. Escape Room 21st Birthday Parties

Another cool 21st birthday theme you could go with is an Escape Room party!

Treat your guests to a fun and thrilling experience to an Escape Room, where they must discover clues to puzzles that they must solve, or tasks they must accomplish, in order to get through specific goals in a limited amount of time.

You can bet everyone will have a blast!

Escape Room 21st Birthday Parties

25. Road Trip 21st Birthday Parties

If you are looking for having a one of a kind experience how about going on a road trip with your best friends for your 21st?

It's such a fun idea, so pick a place, or various hotspots you've all been dying to go to, create a road trip playlist, and hit the road for a trip of a life time!

Road Trip 21st Birthday Parties

26. Karaoke Party 21st Birthday

Sing your heart out at an awesome karaoke-themed 21st birthday party.

Karaoke parties are so much fun and are such a fab way to celebrate a 21st, so grab a karaoke machine and a list of your favorite songs and have a memorable time full of music, dancing and laughter!

! Perfect for people of all ages, a karaoke themed party encourages guests to sing, dance and entertain – all while creating amazing memories. However, throwing a karaoke house party does take some effort. We are sharing the top karaoke party ideas and tips so that you can let loose with your friends while you sing your heart out.

Karaoke 21st Birthday Parties

27. Summer 21st Birthday Parties

If your birthday is during the summer, how about transporting your family and friends to tropical shores full of palm trees with a summer-themed 21st birthday party.

Decorate your party with flamingos, coconuts, pineapples, and everything that reminds you of summer for some fun in the sun.

Serve lots of fresh fruit, salads, and of course, whip up some delicious cocktails!

Summer 21st Birthday Parties

28. Private Chef 21st Birthday Parties

Such a special occasion deserves a special treat, so how about hiring a private chef to come round to your venue and cook up an unforgettable meal?

You could even try and get the chef from your favorite restaurant and treat your guests to a mouth-watering meal to die for.

Private Chef 21st Birthday Parties

29. Costume-Themed 21st Birthday Parties

Have everyone wish you a happy 21st birthday with a fun themed fancy dress party! 

Let everyone in on the dress code (for instance heroes vs villains or Hollywood stars) and enjoy a one of a kind experience that no will be forgetting any time soon.

Don't forget to set up a photo booth for al those crazy photos!

Costume 21st Birthday Parties

30. Casino 21st Birthday Parties

Last by not least, celebrate your 21st in style with an amazing casino-themed birthday party!

Get everyone together for a fun night of blackjack, poker, or roulette, and of course, lots of alcohol.

Better still, if you can take it up a notch, celebrate your 21st in the city of sin with an actual trip to Las Vegas with your friends for the real deal.

Casino 21st Birthday Parties


We hope you enjoyed this post of the top 30 party themes for 21st birthdays!

For more inspiration, check out all our amazing grown-up party themes, and check out these adult birthday party supplies from vendors with listings on Catch My Party!

Need more adult birthday party ideas and inspirations?

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