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21st Birthday Messages for a Friend: Funny & Sincere

From hilarious inside jokes to heartfelt wishes, find the perfect message to celebrate your friend's big 2-1.

FunnySincereCelebratoryNostalgic

Your friend is turning 21, and that calls for a message that's as awesome as they are! Whether you want to make them laugh, get a bit sentimental, or just get the party started, here are some ideas for your mate's card.

Messages for a Friend Turning 21

Funny & Celebratory


  • "Happy 21st! We've been planning for this for years. Let's make it a night we'll never forget (or one we'll struggle to remember). So glad to celebrate with you!"

  • "21 and officially a proper grown-up... or at least that's what we'll tell people. Happy Birthday to my partner in crime!"

  • "Happy 21st Birthday to the one who still acts 12. Never change! Can't wait to celebrate with you."

    • Sincere & Heartfelt


  • "Happy 21st to my incredible friend. Through all the ups and downs, you've been a constant. I'm so lucky to have you in my life and can't wait to see what amazing things you do in your twenties. Cheers to you!"

  • "21 years of you making the world a better place. So proud of the person you are and so grateful for our friendship. Happy Birthday!"

  • "We've made so many amazing memories, and I can't wait to make more as you start this new chapter. Happy 21st Birthday, bestie!"

    • The Night Sky on Their Birthday

    Create a stunning printable star chart showing exactly how the stars aligned the moment they were born.

    Create Birthday Star Chart - From £12.99

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