You might remember Neville Longbottom - the clumsy, forgetful geek with a heart of gold from the Harry Potter films.

Well a few years ago, people noticed that the actor, Matthew Lewis, had grown into a beautiful swan - prompting jokes that he was releasing a self-help book titled, "How to Succeed in Puberty."

Now 25, the star has shed his awkward, pudgy childhood character and is starring in BBC3 military show Bluestone 42 as cheeky chappy Gordon House, who has a penchant for danger and practical jokes - unlike Longbottom.

We had been relying on his Twitter to catch a glimpse of the handsome star - but he recently made his Instagram public.​ Here are some of his most drool-worthy snaps.