Zac Efron [1] has changed a lot since he first came onto the scene in 2004. In the years since, the world has had to come to terms with an undeniable, decade-long crush [2] on the star, so much so that we've all probably brainstormed ways to keep our feelings at bay [3]. You've even gotten to know his girlfriend, Sami MirĂ³ [4], and his younger brother, Dylan [5]. And who could forget the pinnacle of his hotness, when he went shirtless at the MTV Movie Awards in 2014 [6]? That's just the tip of the iceberg, though. To commemorate his epic career, we're taking a look at how much he's changed through the years. Keep reading to have your mind blown, then fawn over his cutest pics with Sami [7].