1. When he gave off the ~dad vibes~ in 17 Again...
2. ...and could barely see at the premiere.
3. The first time he stole our hearts as Troy Bolton.
4. His kiss with Ashley Tisdale on The Suite Life of Zack and Cody.
5. This.
6. When he showed his emotions in Charlie St. Cloud.
7. This throwback post...
8. Hanging out with this iconic duo at the High School Musical 2 premiere.
9. His early days of winning Teen Choice Awards.
10. This family photo.
11. The Link wink.
12. That iconic incident where he dropped a condom on the red carpet.
13. His reluctant friendship with a monkey in a windbreaker.
14. That time he re-created an old look.
15. The Baywatch tumble.
16. When we realized, years later, that he played Young Simon on Firefly.
17. When he dressed in drag with Jimmy and Seth.
18. When he won the coveted "Best Shirtless Performance" MTV Movie Award.
19. This stripper pole challenge on The Graham Norton Show.
20. When he made "The Macarena" tolerable again...
21. ...and made us rethink the science behind boiling water.
22. When he surprised Simone Biles.
23. This poster.
24. Speaking of awkward moments, remember these three at the MTV Movie Awards in 2009?
25. When he failed Tinder.
26. Look at him being a good sport.
27. When he gave Ellen a lap dance... IN LEATHER PANTS.
28. That time he played a wise stoner in Liberal Arts.
29. When Teddy went into gay wedding planning.
30. And his recent "cool" encounter with a bear.
Happy Birthday, Zac! You are a human treasure.
