Former Sex And The City star Jason Lewis is moving on from his split with Rosario Dawson and is dating Buffy The Vampire Slayer star Michelle Trachtenberg. Lewis, 35, and Trachtenberg, 21, were recently spotted on a date at the Chateau Marmont hotel in Los Angeles. A source tells American publication Us Weekly, "They just began hanging out." Lewis and Dawson started dating in 2004 before breaking up in November (06). Trachtenberg has recently been romantically linked with Fall Out Boy bassist Pete Wentz.