21st Birthday Card Messages: What To Write

Even though nothing too major happens at 21, we think it’s still a pretty big deal! 21 means that you’re officially living out your 20s, so make sure the message you put inside their 21st birthday card shows you really do give a funk about them. To help you out we’ve compiled a range of messages you could write in their card (of course with your own personal touch)… 

Sentimental 21st messages

Show them some love with a sentimental message that’ll warm their heart…

• Let’s celebrate 21 years of amazing memories with many more to come. Happy birthday to a very special person!
• Another year, another big milestone! Keep being amazing as you go through your 20s, happy birthday.
• Happy birthday, keep being you and 21 will be your year!
• Your journey into adulthood has just begun and I’m excited to see what your future holds, so happy 21st birthday to you.
• Turning 21 is a big deal and this special day indicates the start of an exciting journey. I hope you have a great 21st birthday.
• Wishing you all the best for this milestone of your life! Happy 21st birthday!
• You only turn 21 once so let’s celebrate and make it special.
• 21 is a big milestone, so I just wanted to say I’m proud of you and everything you’ve accomplished so far.

Funny 21st messages

If you want to make them chuckle then throw in a funny line or two…

• 9 years until you’re 30, let the countdown begin!
• Happy birthday, you’re one step closer to the big 3-0 so it’s all downhill from here.
• Happy 21st, let’s celebrate with dreadful headaches in the morning!
• It seems like yesterday you were a clueless 20-year-old and now you’re a clueless 21-year-old, happy adulthood.
• I know it’s your 21st birthday, but there’s enough alcohol to go around, so no need to get sloppy drunk like your 18th. 
• No matter what happens, you’ll never be underage again. Happy 21st!
• Even though you’re 21 now, don’t grow up because the world is scary and

Messages to a Friend

Now you can both live life in your twenties together, show your bestie how excited you are to finally be adulting together…

• We’re officially in our 20s now so let’s keep having fun before we get too old (30). Happy 21st!
• I’m excited we’re both 21, but now we’re getting old the hangovers really are much worse. Happy 21st bestie!
• Happy 21st! Have a day as wonderful as you are, we’re all very excited to celebrate with you. 
• To my lovely friend, I hope you have an amazing day and I’m excited to make more memories with you.
• Happy birthday to one of the nicest people I’ve ever known, you are my best mate in the world.
• Happy 21st birthday to my best friend. I don’t know where I’d be without you and I’ll always be grateful for your company.
• Have a very happy 21st birthday and I hope that we continue to celebrate together until we’re grey and old.
• Happy 21st birthday to you, can’t wait to live out the rest of our twenties together.

Messages to a Son/Daughter

It must be bizarre to have a child that’s an adult now, so if you’re lost for words we’ve got a few lines for you…

• Turning 21 is a big deal, but this special day is just the beginning of great things to come. I hope you have an amazing 21st birthday.
• Happy 21st birthday Son/Daughter! We’ve had the joy of seeing you through 2 decades, now go out and enjoy the rest.
• We can’t believe you’re 21 now. It’s the best time of your life to create special memories so go out and have fun. Happy 21st birthday!
• Happy 21st, you make us proud every day, now go and celebrate!
• We can’t believe our little boy/girl has finally turned 21 and what an amazing adult you have become. Happy 21st birthday!
• Wishing you a very special year because you deserve it! Happy 21st birthday.
• Happy birthday Son/Daughter, I’ve been proud of you every day since you were born and I am even more proud of you now you’ve turned 21.
• At 21, you’ve officially crossed into adulthood, but you’ll always be my little boy/girl. Happy birthday!

Messages to a Grandson/Granddaughter

The grandkids are getting bigger by the second so make sure not to miss their 21st with a nice message they won’t forget…

• Happy 21st birthday Grandson/granddaughter, we hope your future will be as bright as this special day.
• At 21, you’re not just older; you’re also wiser and more amazing every day. Wishing you the best birthday ever!
• Happy 21st birthday to my lovely grandson/granddaughter, we wish this year will be filled with love, laughter, and incredible memories. 
• Happy 21st birthday! Make the most of your 20s because before you know it 60 years will go by and you’ll be looking like me. 
• Warm wishes on your birthday from your loving Granddad/Grandma.
• We are so proud of you and all your magnificent achievements, have an amazing birthday!
• To our amazing Grandson/Granddaughter, we are so lucky to have you, you are so kind, smart, and thoughtful. Happy 21st birthday.
• We’re so proud of the responsible and caring young man/woman you’re becoming. Keep working hard and chasing your dreams. Happy 21st to our Grandson/Granddaughter!

Once you’ve had that eureka moment and find the perfect message, make sure to take at look at our 21^st birthday cards and see if one catches your eye. Find our whole range of 21^st birthday cards on our website! Whilst you’re there, take a look at the many personalised gifts and specifically 21^st birthday gifts that we have online. You’re bound to find something that’s ideal for that special someone.