Kristen Stewart met up with her pal Tom Sturridge and his girlfriend Sienna Miller last night for an evening of partying in London with Garrett Hedlund! They kicked things off with a meal at the St. John restaurant, which isn't far from Theater Royal where Sienna's acting in the West End production of Flare Path, before moving on for afterhours fun at the Groucho club. Sienna was free for the evening, since her Wednesday performance schedule is just one matinee show. Kristen is in England enjoying the social side of the city after she attend Glamour's Women of the Year Awards Monday in a little Balmain dress. She presented an award to her On the Road costar Garrett at the event, though their fellow castmate, Tom, didn't attend. He's fresh off a weekend with Sienna at the French Open, but they didn't let the tennis action get in the way of their PDA. Kristen's own boyfriend, Robert Pattinson, missed out on the hangout session with Tom and Garrett, since he's in Canada shooting Cosmoplis. He and Kristen were able to spend some quality time last weekend when they met up in LA for the MTV Movie Awards.