Pictures: Paris Hilton's Sexy Alice in Wonderland Halloween Costume, Boyfriend as Mad Hatter

Celebrities attending a Halloween party in Beverly Hills, California on October 26, 2012.

Pictured: Paris Hilton, River Viiperi (Source: FameFlynet Pictures) more pics

Paris Hilton is Alice for Halloween (FameFlynet Pictures)

The first round of Halloween parties kicked off in Beverly Hills last night, and the stars were out in droves! One of the hottest costumes of the night was on the gorgeous Paris Hilton.

The star put a sexy spin on Alice in Wonderland with a sexy satin dress, complete with a collar and adorable headband. The outfit fit her perfectly and she even dressed it up with sparkly jewelry and hot thigh-high stockings.

And, she had a handsome partner in crime for the evening, her beau River Viiperi. He was the Mad Hatter and wore a bright purple vest, green jacket, giant top hat and playful green eye makeup. What a good sport!

The couple hit up a star-studded Halloween party and mingled with other celebs like Alessandra Ambrosio and Hilary Duff. What a night! What do you! think Paris will dress up as tonight? Something new? Most likely! Stay tuned.

The Best Celebrity Halloween Costumes

Check out celebs all decked out for the spookiest holiday of the year!

See more Paris Hilton pics here:

Celebrities attending a Halloween party in Beverly Hills, California on October 26, 2012.

Pictured: Paris Hilton, River Viiperi (FameFlynet Pictures)more pics
Celebrities attending a Halloween party in Beverly Hills, California on October 26, 2012.

Pictured: Paris Hilton, River Viiperi (FameFlynet Pictures)more pics
Celebrities attending a Halloween party in Beverly Hills, California on October 26, 2012.

Pictured: Paris Hilton, River Viiperi (FameFlynet Pictures)more pics

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