Sienna Miller Previews 'After Miss Julie'

Sienna Miller and co-star Jonny Lee Miller, pictured below, sign autographs and take pictures with fans after a preview performance of their new play After Miss Julie at the American Airlines Theatre on Friday (September 18) in New York City.

This is the Broadway debut for both Sienna, 27, and Jonny, 36!

You can pick up tickets for the play through December 6 at RoundaboutTheatre.org.

10+ pictures inside of Sienna Miller‘s preview performance of After Miss Julie…