Nicole Richie scored on her first post-baby acting job -- guest starring as a mean girl on Chuck! Nicole will play a "snarky and spiteful girl who tortured" Special Agent Sarah Walker (Yvonne Strahovski's character) in high school in an episode that will air this fall, according to NBC. "Nicole auditioned for the part and was very funny," executive producer Josh Schwartz says. "This role is a great opportunity for her to show off her comedic skills and be diabolically evil and kick some butt. It's going to be really fun." We've gotta say that we're pretty stoked! Nicole cracked us up with her mischievous ways on The Simple Life, and we can't wait to see more of her on the small screen.