She certainly has a raunchy past, but last night George Clooney's girlfriend looked a picture of demure sophistication as she walked the red carpet at the Hollywood premier of Leatherheads.

With her strapping man by her side, Sarah Larson, 28, worked her charm in an elegant little black dress, peep toe heels and a high-wattage angelic smile.

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Stylish: Clooney and Larson in matching outfits for the premiere of his film Leatherheads

If Larson was embarrassed by the string of racy pictures that have emerged in recent times, she certainly did not let it show.

She was joined by an A-list crowd, which included Clooney's co-star and close friend, Renee Zellweger.

Clooney and Zellweger are rumoured to have a romantic history - a claim both parties deny - but they were certainly not hiding their affection for each other.

They kissed and hugged on the red carpet, momentarily leaving Larson out in the cold.

Just this week more images of Larson surfaced which showed the brunette in a series of compromising positions with female friends.

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A-list: Larson hads made sure she fits right in with Hollywood's biggest stars

Old friends: Clooney surprises Renée Zellweger and gets a hug for his troubles

Larson as a cocktail waitress at Las Vegas's Moon nightclub in the Palms Casino Resort, where Ocean's Thirteen had its premiere in June last year.

Besides appearing tactile with fellow female models, Larson also appears to be enjoying some male attention too, receiving a foot licking from an admirer.

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Black belt: Larson and a friend called Amber go for the bondage look while on a modelling assignment in Florida in 2005

Racy: Larson reveals her raunchy side as she attempts to take a bite out of a friend

Another image taken the following day shows a bikini-clad Sarah on all fours licking a magazine cover at a pool party at Hard Rock Hotel & Casino.

With her curvaceous behind stuck in the air, fun-loving Larson poses provocatively for the cameras.

These latest images follow sexy photos of Larson published last year of the brunette in a series of sexy bikini shots as she worked as a promotional model.

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Submission hold: The 28-year-old grapples with a giggling pal at yet another party

Got it licked: The former model plays in the sand at a wild Las Vegas party last July

Clooney and Larson officially became an item last September at the Venice Film Festival after she quit her bar job at the Palms Hotel & Casino resort in Vegas to travel the world with the Oscar winner.

The pair met at the Moon nightclub on the top floor of the Palms resort last June as the 46-year-old star attended a party for his movie Ocean's Thirteen.

Clooney was so smitten with his pretty waitress, he asked her boss to give her the rest of the night off so they could get to know each other better.

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Playing footsie: Larson's feet get special treatment from an admirer at a party last year

Chilled: After all that partying, Larson relaxes with a friend

Over the next few months, Clooney invited Larson to fly out from Vegas and visit him whenever he in the U.S., before they finally decided to go steady in late August.

Clooney debuted Larson as his new girlfriend with a public kiss at the Venice Film Festival party for his film Michael Clayton at the Cipriani restaurant.

Only a few weeks after their official debut as a couple, Larson broke her foot after the pair were in a motorcycle accident.

Clooney was driving the bike with Larson as his passenger when they collided with a car in New Jersey. The actor was left with a rib fracture, while Larson spent the next few weeks on crutches.

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Cheers: Larson in her days as a promotional model at the 2005 Volleypalooza held at the Palms Hotel in Las Vegas

In a clinch: A leggy Larson gets to grips with a male companion in a Vegas nightclub last July