He's best known for playing Draco Malfoy's sidekick Gregory Goyle in the Harry Potter films.
But 28-year-old actor Joshua Herdman looks NOTHING like he used to - and he's had a drastic career change.
He's gone from being an actor to being a professional cage fighter.
And here are the pictures to prove it.
Here's what Josh looks like now:
And this is what he used to look like in his Harry Potter days:
In case you needed another reminder, look at this photo he shared a few weeks ago, too:
These days Josh is a MMA (Mixed Martial Arts) fighter and recently won one of his first big fights.
He's quoted by an MMA blog, called AddictedMMA On The Road, as saying in an interview: "I haven't fallen out of love with it (acting), I still have an agent and still go for auditions. It's just a little bit like playing the lottery for a living."
When asked about the Harry Potter cast and which former cast member he'd "like to manhandle in a cage for 15 minutes", he said: "I don't have any beef with any of the cast to be honest, they were all pretty good guys."