Uma Thurman is reportedly romancing Elle Macpherson's ex-boyfriend. The Kill Bill star, who split from hotelier Andre Balazs in March, was seen canoodling with Swiss banker Arky Busson during a romantic night out. A source told the New York Post newspaper: 'They had their arms wrapped around each other and seemed oblivious to everyone around them.' Uma and Arky - who has two sons with model Elle - first met last month at designer Valentino's 45th anniversary party in Rome. Uma - who was recently linked to actor-director David White - has two children, eight-year-old Maya and five-year-old Levon, from her five-year marriage to actor Ethan Hawke. The actress' marriage to Hawke ended in 2004 amid reports he cheated on her with a Canadian model. Uma, 37, then embarked on a three-year on/off relationship with Balazs. Last year, the actress admitted she was trying to perfect the art of making a relationship work. She said: 'You need to want to be forgiving. The problem is that, if you want to, you'll forgive the unforgivable. I am very perceptive about people, but then if I'm attracted to them, I'm not always looking clearly. 'I'm working on a decoding system - especially for men.' (C)