Photos! The Cast of Cabaret Welcomes New Star Sienna Miller to the Kit Kat Klub

It’s the toast of Mayfair, Fraulein Sienna Miller! The American Sniper and Foxcatcher star officially became a member of the Kit Kat Klub on February 17, joining her new Cabaret co-stars Alan Cumming, Bill Heck, Danny Burstein, Linda Emond and more. After wowing the crowd with her performance as Sally Bowles, Miller took her first bows for a cheering audience at Studio 54. Check out these shots of Miller’s debut as Sally, then see her (with her green-painted fingernails!) live on Broadway.