Sienna Miller: ShoWest Best Supporting Actress

Always a fan of high-profile events, Sienna Miller was spotted hamming it up at the 2009 ShoWest Awards last night (April 2) at Paris Las Vegas.

The “Factory Girl” gal was all smiles as she hit the red carpet, looking uber-sexy in a red/gold/black patterned dress with black zip-up heels.

Before the night was over, Miss Miller was awarded the Best Supporting Actress of the Year trophy for her work in “The Edge of Love.”

Fellow Brit Michael Caine also showed up to take home the Lifetime Achievement award, while Zac Efron picked up the Breakthrough Performer of the Year for “HSM3.”

Gossip Girls

Enjoy the pictures of Sienna Miller at the ShoWest Awards (April 2).