Nicole Richie to Appear on NBC's Chuck

Nicole Richie will guest star an episode of the NBC drama Chuck this fall. The former Simple Life star – and mom to five-month-old Harlow – will play the high school nemesis of Special Agent Sarah Walker (played by Yvonne Strahovski ). "Nicole auditioned for the part and was very funny," executive producer Josh Schwartz said in a statement. "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." (See Nicole's first time on the red carpet.) In other casting news, it was announced Tuesday that Mary-Kate Olsen will appear on Samantha Who . (Check out other stars on set.) Tell Us : Should Nicole get her own TV show? (link)