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100 Brilliant 18th Birthday Captions for Instagram

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This is the definitive collection of 18th birthday captions for Instagram. Wow, what a milestone! Turning 18 makes the start of adulthood. Hopefully, you’re having an amazing celebration to mark this special occasion.

We’ve collected together a massive list of 18th birthday Instagram captions for you to choose from. Simply browse the list and pick your favorite! Take as many photos as possible to remember this awesome day.

There are so many quotes for turning 18 to choose from in this extensive article!

18th Birthday Captions for Instagram

18th Birthday Captions for Instagram
  • Let’s see what 18 is all about.
  • Surround yourself with people who are more excited about your birthday than you are.
  • 18, wild & free.
  • I’m 18 now. An adult. I can have ice cream for breakfast.
  • Vibin’ and thrivin’.
  • Club Adulthood’s newest member.
  • Gonna party like it’s my birthday…’cause it is.
  • Cheesin’ because I’m 18!
  • Here for the cake.
  • Adult-ish.

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18th Birthday Captions
  • Am I, like, a grown-up now?
  • 18 years of being fabulous!
  • Today is a great day cause it’s my 18th birthday!
  • Established [birth year].
  • Hold on to your inner child as you grow older.
  • The real adventure starts now.
  • Birthdays are nature’s way of telling us to eat more cake.
  • Please be good to me, 18.
  • Bringing bigger dreams to 18.
  • I don’t know about you, but I’m feeling 18.

Next: Happy Captions for Instagram

Captions for 18th Birthday
  • Grown-ish.
  • Adult mode: Activated.
  • Do I look much older than last year? I mean, yesterday?
  • It took 18 years to get this awesome.
  • From now on I can have ice cream for dinner whenever I want to!
  • Now an adult – watch out.
  • Birthdays are incomplete without the ones who love and care for you.
  • My birthday is today, but I’ll take presents whenever.
  • Another year older, but wiser? Not sure about that part.
  • Dancing Queen at 18.

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18th Birthday Instagram Captions
  • Eighteen, queen.
  • Season 18, Episode 1
  • Old enough to know better and no longer young enough to get away with it.
  • Cheers and beers to my 18 years!
  • Adulting since… today!
  • Here’s to 18 years.
  • I can think of 18 reasons you should have a good birthday.
  • Keep calm and start adulting.
  • Hip, hip, hooray.
  • 18 candles to make a wish on.

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18th Birthday Caption
  • To 17: Thank u, next.
  • Another year older, none the wiser.
  • Level 18 reached! Leveling up.
  • Of course, I don’t know how to act my age. I’ve never been this age before!
  • Hugs, kisses, and 18 birthday wishes.
  • It’s not the years that count, it’s the memories you make over these years.
  • I’m too young to be 18 years old.
  • 18 looks pretty good on me.
  • Warning: 18 & sexy.
  • Started from the bottom now we 18.

Next: Good Vibes Captions for Instagram

Insta Captions for 18th Birthday
  • Guess who’s a legal adult?
  • Lean, mean, eighteenth-birthday-having machine.
  • Eighteenth tastes as sweet as my cake.
  • 18 doesn’t feel much different, but it sure is fun to say!
  • Here’s to good friends, good vibes, and another 18 years.
  • Gonna party like it’s my 18th birthday, cause it is.
  • Shoutout to being a full adult.
  • Both an adult and a teenager.
  • 18 years young today.
  • Birthdays are good for you. Statistics show that the more you have the longer you live.

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18th Birthday Quotes for Instagram

18th Birthday Quotes for Instagram
  • “Life would be infinitely happier if we could only be born at the age of 80 and gradually approach 18.” – Mark Twain
  • “When I turn 18, I need to ride on some rims that are clean and their brand new J’s when I hit the scene.” – Bow Wow
  • “The best birthdays of all are those that haven’t arrived yet.” – Robert Orben
  • “The way I see it, you should live every day like it’s your birthday.” – Paris Hilton
  • “I just turned 18, 18, lucky number 18.” – Young Jedi
  • “The older you get the better you get, unless you are a banana.” – Betty White
  • “Live as long as you may. The first twenty years are the longest half of your life.” –  Robert Southey
  • “We are only young once.  That is all society can stand.” – Bob Bowen
  • “Put candles in a cake, it’s a birthday cake. Put candles in a pie, and somebody’s drunk in the kitchen.” – Jim Gaffigan
  • “Common sense is the collection of prejudices acquired by age eighteen.” – Albert Einstein

Next: Prom Captions for Instagram

Quotes For 18th Birthday
  • “I’m eighteen. And I don’t know what I want.” – Alice Cooper
  • “Eighteen, crazy. I know what you want from me” – Anarbor
  • “Beauty queen of only 18.” – Maroon 5
  • “Count your age by friends, not years. Count your life by smiles, not tears.”  –  John Lennon
  • “Now you’re 18 the government will treat you like an adult, even if your parents still want to treat you like a kid.” – Unknown
  • “Age is a high price to pay for maturity.” – Tom Stoppard
  • “Because I’m 18, and I still live with my parents. They’re not like yours.” –  Khalid
  • “You are only young once, but you can stay immature indefinitely.” – Ogden Nash
  • “She’s only 18, don’t like the Rolling Stones.” – Red Hot Chili Peppers
  • “I have the body of an eighteen-year-old. I keep it in the fridge.” – Spike Milligan

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Turning 18 Quotes
  • “Eighteen is a tricky age. You have the freedom to do everything but the money to do nothing.” – Unknown
  • “Beauty queen of only 18, she had some trouble with herself.” – Maroon 5
  • “Live as if you were to die tomorrow, learn as if you were to live forever.” – Mahatma Gandhi
  • “My life is better with every year of living it.” – Rachel Maddow
  • “She’s in the Class A Team. Stuck in her daydream. Been this way since 18.” – Ed Sheeran
  • “Why is a birthday cake the only food you can blow on and spit on and everybody rushes to get a piece?” – Bobby Kelton
  • “And every week we celebrate like it’s my birthday / When I turn 18.” – Bow Wow
  • “I cried on my 18th. 17 was such a nice age. You’re young enough to get away with things, but you’re old enough too.” – Liv Tyler
  • “Yea tonight can we just hold on to those 18 years.” – Daughtry
  • You know you are getting old when the candles cost more than the cake. – Bob Hope

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Quotes About Turning 18
  • “At the end of the day, I’m eighteen, and I’m going to fall in love.” – Selena Gomez
  • “You don’t get older, you get better.” – Shirley Bassey
  • “When you turn 18, you can legally do all the things you’ve been doing since you were 15.” – Unknown
  • “All the world is a birthday cake, so take a piece, but not too much.” – George Harrison
  • “You’re just jealous ’cause I’m young and in love. 18 forever.” – Brand New
  • “Don’t just count your years, make your years count.” – George Meredith
  • “So you can vote… you can drink…take a wife… get a life!” – Unknown
  • “Wanna be young the rest of my life, never say no, try anything twice, ‘til the angels come and ask me to fly, gonna be 18 ‘til I die.” – Bryan Adams
  • “I intend to live forever. So far, so good.” – Steven Wright
  • Hugs, kisses, and lots of birthday wishes!

Next: Family Captions for Instagram

Image of Iain The Founder Of The Road Trip Expert

Iain Salter

Founder & Editor of The Road Trip Expert

Iain founded The Road Trip Expert in 2019 and continues to manage the website to this day. The inspiration to start the blog came during an extensive road trip around Europe with two friends that spanned several months and involved over 25,000km of driving. He first developed a passion for backpacking in 2014 and has had the pleasure of exploring over 60 countries.