Isla Lang Fisher (pronounced /ˈaɪlə/; born 3 February 1976) is a British actress and author who began her acting career on Australian television. She appeared on the short-lived soap opera Paradise Beach before playing Shannon Reed on the soap opera Home and Away. She has since been known for her comedic roles in Scooby-Doo (2002), Wedding Crashers (2005), Hot Rod (2007), Definitely, Maybe (2008), and Confessions of a Shopaholic (2009).