From Hogwarts to the school of hard knocks!

Josh Herdman played a bully as Gregory Goyle in the "Harry Potter" films, but now he's trying to bully people in a different way.

Photofest / .

The actor is now a cage fighter.

Josh, who played Draco Malfoy's sidekick in the films, recently made his fighting debut in East London at Rise of Champions 2, an event that featured both professional and amateur mixed martial art fighting (think UFC, but on a lower level.)

And so far, he's a bit of a wizard in the cage -- he's undefeated after one fight. He won a unanimous decision against his fellow amateur fighter.

Josh didn't speak about the fight on Twitter (he retweeted what others said,) but his bio says that he is a "father, actor and martial artist, amongst other things."

However, he recently told a fighting blog that his win was no accident.

"I've been training traditional Japanese jujitsu for nearly five years and hold a shodan black belt," the "Harry Potter" star told On The Road With Addicted MMA.

"It's raw, exciting, and unpredictable," he added. "I find it more interesting than boxing although I appreciate the beauty and art in boxing. It also made sense to move onto MMA because of my jujitsu training."

In a way, athletics (and specifically fighting) runs in the family. Josh's father, Martin Herdman, was a boxer and professional rugby player in his 20s. His two older brothers have also boxed.

Despite his unblemished MMA record, Josh says he isn't giving up his day job for now.

"I don't see it so much as a career change, I still act and am passionate about both acting and fighting," he said. "I obviously grew up around sport, looking at my dad's newspaper clippings as a kid, he taught us all how to fight from an early age, I also played rugby from about 6 - 13."

Still, though, he seems much more passionate about life in the octagon than life on the big screen.

"I haven't fallen out of love with it," he said of acting. "I still have an agent and still go for auditions. It's just a little bit like playing the lottery for a living."

… In the octagon, sorcery isn't needed, just a good armbar, and even Voldermort may fear that.