Isla Lang Fisher (/ˈaɪlə/; born 3 February 1976) is a British-Australian actress who began her acting career on Australian television. She was born to Scottish parents in Oman and raised in Australia. She appeared on the children's adventure series Bay Cove, and 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), I Heart Huckabees (2004), Wedding Crashers (2005), Hot Rod (2007), Definitely, Maybe (2008), Confessions of a Shopaholic (2009), Rango (2011), Bachelorette (2012), and the fourth season of Arrested Development (2013). In 2013, Fisher starred as Myrtle Wilson in The Great Gatsby and as Henley Reeves in Now You See Me.
She has been married to English comedian and actor Sacha Baron Cohen since 2010 and has two children with him.