Rachel Bilson covered her short shorts with a cozy robe on the set of The To Do List yesterday in LA. Rachel wore rollers and hoop earrings between scenes as she got into the character of a recent high-school graduate who decides to spend the Summer before college racking up more sexual experience. She stars with Andy Samberg and Community's Donald Glover in the movie, which is the second she's filmed this year following L!fe Happens, formerly called BFF & Baby, with Kate Bosworth. Rachel will also make a return to the small screen this Fall with her CW series Hart of Dixie. Rachel appears as a city-dwelling doctor transplanted to the country in the show, created by The O.C.'s Josh Schwartz. Rachel and on-again boyfriend Hayden Christensen have been enjoying the Summer together before her promotional duties for her TV show heat up ahead of its September debut.