Sienna Miller: Pretty in Plaid

Sienna Miller swiftly exits the stage door after performing in Flare Path at the Theatre Royal on Monday (May 9) in London, England.

The 29-year-old British actress wore a red plaid shirt and gray sweats as she stepped out to sign autographs for fans. She also hung out with a mystery male while waiting for their car.

Sienna is currently starring in the play Flare Path, which is directed by Broadway and West End veteran Trevor Nunn. She has a few more shows before production ends June 11!

15+ pictures inside of Sienna exiting Theatre Royal…