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Zach Galifianakis Shows Off Drastic Weight Loss - And Man Bun!

The Hangover star almost went unnoticed at the Screen Actors Guild Awards...

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As far as celebrity transformations go, Zach Galifianakis' new look is right up there with Justin Bieber chopping off his mop top or Tulisa's infamous "trout pout".

The star of Birdman and The Hangover trilogy caused numerous double takes at the Screen Actors Guild Awards last night with his new slimline, less hairy look.

And as well as losing a ton of weight and swapping his beard for a bit of designer stubble, the 45-year-old was also rocking the male celeb hairstyle du jour - the man bun.

Galifianakis also appeared in the introductory montage of stars - saying on screen: "I am Zach Galifianakis and I...am an actor?"

He didn't go home empty-handed by the way - winning the best acting ensemble award with his Birdman co-stars.

Galifianakis appears to have lost even more weight since last October - when he first showed off a slimmer figure.

And he told US chat show host Conan O'Brien last year that he had mainly cut down on booze to shed the pounds.

"I stopped drinking and I just kind of put the weight off," he explianed. "I was having a lot of vodka with sausage. Delicious but bad for you.

"I was getting into too much trouble with the drinking, so I just kind of stopped."

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