Sienna Miller hugged a friend as she left the Royal Haymarket Theatre in London last night. She was sporting sweats after another night on stage for her production of Flare Path, which has been running for the past couple of months and may bring her to the states for a run on Broadway later this year. Her rigorous performance schedule has meant fewer date nights with her man, though hopefully Sienna Miller and Tom Sturridge are going strong. Sienna was reportedly spotted partying with his best friend Robert Pattinson when he was in town premiering Water For Elephants last week, which is a good sign that Sienna's still smitten with Tom. Sienna has also been working hard on Twenty8Twelve, though she surprisingly does not have a spot in the PopSugar 100's top 10 most stylish celebrities at the moment!