Today is Zac Efron's birthday, so let's celebrate the cutie on his 31st birthday. Can you believe Zac is over 30? We definitely can't believe the 17 Again star is a day over, well, 17. Although we are relieved he isn't barely legal.

Happy Birthday to Zac Efron!

Zac burst onto the scene with his role in High School Musical, but he's proven himself to a hilarious hottie with his wonderful dudity in Dirty Grandpa.

Happy Birthday to Zac Efron!Happy Birthday to Zac Efron!Happy Birthday to Zac Efron!

He also sported a very grownup, muscular body in Baywatch. Baywatch is known for busty women running on the beach, but we were watching for Zac's rippling muscles. Just look at how buff he got boy Baywatch! Zac, you can be our bae anydaywith perfect pecs like those.

Happy Birthday to Zac Efron!