Sienna Miller: Friday at 'Flare Path'

Sienna Miller leaves the Theatre Royal Haymarket after another performance in her play, Flare Path, on Friday (March 18) in London, England.

The night before, the 29-year-old British actress enjoyed a night out at The Box nightclub with some friends.

Earlier this week, Sienna and her big sis Savannah, launched the latest collection from their Twenty8Twelve line.

FYI: Sienna is carrying a Prada mandarino and nero madras leather bag from the Spring Summer 2011 collection.

10+ pictures inside of Sienna Miller after performing in Flare Path…