Turning 18 is a huge milestone and deserves to be celebrated! It's not always easy to find the right words, especially with big events like an 18th birthday. That's why we've created a list of some of our favourite ways to say Happy 18th Birthday, whether you want a funny message or something more heartfelt and thoughtful.
And if you haven't yet found the perfect 18th birthday card, take a look at our Birthday Cards Collection here.
Short and Sweet 18th Birthday Messages
- Wishing you all the happiness in the world on your special day.
- Sending big birthday wishes on your 18th birthday, what a milestone!
- Happy 18th Birthday- Welcome to adulthood!
- Happy 'Officially a grown up' Day!
- Your 18th birthday is just the start of the next adventure!
- Cheers to 18 years of fun, friendship and lots of laughter together.
- Someone as wonderful as you deserves the best birthday in the world.
Thoughtful and Sentimental 18th Birthday Messages
- Congratulations on turning 18! May your birthday be the start of a wonderful chapter in your life.
- Congratulations on becoming a kind, funny and truly wonderful adult.
- Happy 18th Birthday! May this year bring you the freedom to chase dreams, the courage to embrace change, and the joy of discovering who you are.
- May your day be filled with love, excitement, and the anticipation of all the wonderful things ahead.
- Here’s to stepping into adulthood with grace, courage, and the knowledge that you’re capable of amazing things! Happy 18th Birthday!
Funny 18th Birthday Messages
- Being an adult is just like being a child, except there’s more hard work and lots of depression.
- Apparently, you’re an adult now. I don’t buy it.
- Happy 18th birthday! Now you’re an adult you can do everything legally you were doing illegally before…
- Now you’re finally 18 and can legally drink, I promise to hold your hair back any time you need.
- Happy 18th! It's just like before, except you can now buy alcohol with an ID that has your real date of birth on it.
- Now that you're an adult, you’ll have the freedom to do everything but the money to do nothing. Congratulations!
- See those tiny wrinkles next to your eyes? Prepare to start building an impressive collection.
- Today might be your 18th birthday, however we both know that you’re still a child inside. Happy birthday!
18th Birthday Messages for Son or Daughter
- Now you’re 18 we won’t be paying your phone bill, happy birthday.
- Not a day goes by that we don’t feel proud of who you are and what you do for others around you. Happy 18th Birthday and welcome to adult life.
- No matter what you do in life, we’ll always be here to cheer you on, offer support and help you in any way we can. We love you so much and wish you the happiest 18th birthday ever.
- You may be an adult, but you’ll always be our little girl. However, we’re still not getting you a pony.
- Our tiny bundle of joy is now a tall, hairy man who leaves the toilet seat up. Happy Birthday son!
18th Birthday Messages for a Grandchild
- We’re so proud to have watched you transform from the cutest kid into the most beautiful adult.
- To my amazing Granddaughter/ Grandson, we can’t believe what a lovely young woman/man you’ve grown up to be. Happy 18th birthday!
- We couldn’t feel older now you are officially an adult, it was only yesterday we held you as a tiny baby.
- Happy Birthday to my/our fabulous 18-year-old granddaughter/grandson! May this year be filled with joy, kindness, and all the things that make your heart happy. I/We love you endlessly!
So there you have it, 30 gorgeous 18th birthday message ideas! Be sure to check out our birthday cards here.