Rachel Bilson and Zachary Levi pictures have turned up both of them in costume. The possible on-screen lovebirds filmed scenes for NBCs sci-fi action-comedy Chuck in West Hills, Calif. on Friday. Rachel was dressed in an uber cute white dress and black cardigan. She definitely dressed the part for a possible love interest for geek-turned-government-agent Chuck (Zachary Levi, pictured). Its not hard to imagine as Chuck as The O.C.s indie cutie Seth Cohen (Rachels on-and-off-screen romantic interest). And how cute! Rachel brought along her 5-year-old sister Hattie on the Chuck set!