06/11/2013 11:08 EDT

Dan Stevens Debuts New Look: 'Downton Abbey' Star Shows Off Svelte Frame At Movie Premiere (PHOTOS)

It seems that leaving "Downton Abbey" has made Dan Stevens almost unrecognizable.

The Brit actor, who played uppercrust Matthew Crawley in the hit TV series before his abrupt departure at the end of Season 3, showed off his newly svelte frame at the premiere of his new film "Summer In February" in London on Monday.

Looking fit and trim in a shiny grey suit, the 30-year-old proudly showed off his post-"Downton" look alongside his wife, singer Susie Hariet.

Gone were the floppy blond hair and large bow-ties. In their place? A short, dark 'do and slim-cut, tailored suits. (Is it any wonder that Stevens was named GQ's Best Dressed Brit?)

But the actor's fit frame didn't happen by accident. The father-of-two admitted that he lost some weight for a movie.

"I've lost about 30 pounds since New Year, which, in British terms, is about two or three chins," Stevens said on the Graham Norton Show.

"It was for a role," he said. "It's always me, just different incarnations, different roles, different costumes and different sizes. As for the hair, it's pretty much my natural color. I went very dark for the last role, but I'll see where I go with it."

It's too bad we won't see this version of Matthew Crawley on Season 4 of "Downton"! We're sure Mary would have loved her hubby's hot look.

Also on HuffPost

Photo gallery British Celebrities See Gallery