Pictures: Sarah Larson's Wild Past Revealed

A U.S. magazine has obtained racy pictures of George Clooney’s girlfriend, Sarah Larson, in her former incarnation as a Las Vegas go-go dancer.

As well as the pics – which show Sarah in a number of suggestive and scantily clad poses – the mag have also got a friend lift the lid on her wild, pre-George lifestyle.

"Sarah looks like she totally belongs, walking down the red carpet on George's arm," a source close to her tells Star.

"She's even been described as having a successful runway and print modeling career. But until recently, her modeling career consisted mostly of being paid by promoters for clubs, magazines and radio stations to attend special events in sexy outfits and party with her wild girlfriends!

"Sarah is outgoing and fun and loves to drink. She likes to get wasted when she goes out - but hey, that's what Vegas is all about!"

In one photo - from July 2007 - she's pictured in a nightclub, with her legs wrapped around a man as he holds her up against a wall.

In another, a bikini-clad and drunk-looking Sarah kneels on all fours with her backside in the air as she licks the cover of a magazine lying on the ground at an outdoor pool party

There is also reportedly a shot in which she's shown rolling around on the floor as she wrestles a bikini-clad blonde.

"That's our Sarah!" says the source. "She's not shy in the slightest. She loves hamming it up and is never embarrassed.

"That's the Sarah everyone in Vegas remembers, not the girl dressed in Valentino minding her manners for the cameras with George at the Oscars!"

Whatever happened to 'what happens in Vegas, stays in Vegas'?

Click here for a look at the raunchy snaps.