Stepping out on the town, Sienna Miller dropped by the Hollywood Dominos VIP Launch held in Knightsbridge, London on Friday (November 7).

Joining fellow attendees Olivier Martinez, Eva Herzigova and Ridley Scott, the "Factory Girl" actress was there to help present the exclusive event in aid of reigning Hollywood Domino queen Charlize Theron's Africa Outreach Project.

With London being the first step, a company press release tells, "On November 9th the battle will take flight to New York. The second round will be played at the Edison Ballroom to benefit The Art of Elysium. Confirmed attendees include Salma Hayek, James Franco, Nicole Richie, Joel Madden, Jessica Alba, Molly Sims, Jeremy Piven, Kim Raver, Jason Lewis and more."

"We're so excited to be launching Hollywood Domino on both sides of the Atlantic. We hope everyone enjoys this Christmas must play game with their friends and family," co-founder Daya Fernandez told press.

Gossip Girls

Enjoy the pictures of Sienna Miller at the Hollywood Dominos VIP Launch (November 7).