Jonathan Lipnicki

Jonathan Lipnicki is a special case. In ’90s hits Jerry Maguire and Stuart Little he was the cute, nerdy kid with glasses. Then he went through a chubby, awkward phase, as parodied on Family Guy. Cut to the present day, however, and he’s a ripped MMA fighter with a six-pack. Quite the transformation.

Joseph Gordon-Levitt

Joseph Gordon-Levitt first made a name for himself by playing long-haired dork from another planet Tommy Solomon in 3rd Rock from the Sun. Yet unlike a lot of TV stars, Gordon-Levitt successfully swapped the small screen for the silver one, starring in blockbusters such as Inception and Looper as a strikingly handsome lead.

Nicholas Hoult

British actor Nicholas Hoult is another celebrity who successfully transitioned from unassuming child star to hunky leading man. And it’s almost difficult to believe that the nerdy kid from About a Boy would turn into a strangely attractive zombie, as Hoult did in spooky 2013 rom-com Warm Bodies.

Jerry O’Connell

Jerry O’Connell would make a great poster boy for puberty. Incredibly, the Sliders star went from playing the fat kid in Stand By Me to being the ripped Hollywood actor we know today. And he’s married to model-turned-actress Rebecca Romijn. Way to go, dude.

Matthew Lewis

We’ve covered Daniel Radcliffe and Emma Watson already, but perhaps the most shocking Harry Potter-related transformation goes to Matthew Lewis, whose portrayal of chubby nerd Neville Longbottom got more unbelievable as the franchise rolled on. It’s safe to say that Lewis has definitely grown into his looks.

Daniel Radcliffe / Harry Potter

The world watched as Harry Potter star Daniel Radcliffe changed from a nerdy little kid into an attractive, well-groomed young man who isn’t afraid to drop his pants on Broadway.

Josh Peck

Josh Peck has come a long way since he played chubby goofball Josh Nichols in Nickelodeon’s Drake & Josh. These days, Peck cuts a far more dashing and undeniably handsome figure, as seen when he hosted the 2015 Teen Choice Awards.

Zac Efron

Before High School Musical, Zac Efron was a rather gawky child actor, starring in movies like Melinda’s World and Miracle Run. Still, it’s fair to say that in 2014 Efron finally shook off his Disney past by playing brawl-happy party animal Teddy Sanders in NSFW comedy Neighbors – and was definitely hot with it.