Jessica Hart has moved on from long-term boyfriend and Tamarama band member Nicolas Potts to Paris Hilton‘s ex, Stavros Niarchos. The Sports Illustrated model and the Greek shipping heir were canoodling at 1Oak on Wednesday, a spy said, and eventually left together. Hart and Niarchos were friends while Hart dated Potts, but became romantic in the past month. They were earlier spotted at Kenmare for One Management’s holiday party, also attended by founder Scott Lipps, Nur Khan, Sante D’Orazio and Byrdie Bell. Hart’s rep had no comment.