Sienna Miller: International Medical Corps Awards Celebration!

Sienna Miller strikes a pose at the 2011 Annual International Medical Corps Awards Celebration held at the Beverly Wilshire Four Seasons Hotel on Tuesday (November 8) in Beverly Hills, Calif.

The 29-year-old British actress, who wore a Neuve Romper from Twenty8Twelve‘s AW11 collection, was honored with the Global Activist Award for her work with the corporation.

PHOTOS: Check out the latest pics of Sienna Miller

“This is an organization that is very close to my heart,” Sienna recently expressed. “After seeing their courageous work up-close I was determined to become more involved. I am honored to be their ambassador.”

Also pictured: Sienna touching down at LAX airport in Los Angeles earlier in the day after a flight from England.

15+ pictures inside of Sienna Miller at the International Medical Corps Awards Celebration…