"I think I was watching Birdman (and) I suddenly had this urge to get back in theatre and I'd worked with the Roundabout (Theater Company) before and the movie I was supposed to do got pushed, so I had this time, and any excuse to be in New York... but it's such an iconic part." Sienna Miller was inspired to return to Broadway after watching Oscar-nominated movie Birdman, in which Michael Keaton plays a washed up actor trying to revive his fortunes in the theatre. The blonde beauty will take over from Emma Stone as Sally Bowles in the Cabaret revival on Tuesday (17Feb15).