Bradley Cooper reported back to his London hotel on Thursday night to prepare for yesterday's premiere of his mind-bending, chemically enhanced thriller Limitless. He was joined by costar Anna Friel at the UK event, though he reunited with Robert De Niro and Abbie Cornish for Tuesday's NYC screening. Bradley chatted with us about filming "technical" love scenes with Abbie and shared his excitement about his upcoming The Hangover 2. He'll share more personal stories and memories next week on Inside the Actors Studio, where his girlfriend, Renée Zellweger, supported him from the front row. She's not with him in Britain, though; she went back to her home state for the Texas Film Hall of Fame Awards.