Entertainment Tonight'Confessions of a Shopaholic' star Isla Fisher is joining Johnny Depp in an ensemble cast for the animated adventure 'Rango,' according to Variety.Fisher will voice the female lead in the movie opposite Depp, who plays a household pet who goes on an adventure to discover his true self. More details about the film are being kept tightly under wraps.Abigail Breslin, Alfred Molina, Ray Winstone, Harry Dean Stanton and Ned Beatty round out the cast of the project that reteams Depp with his 'Pirates of the Caribbean' director Gore Verbinski, scheduled for a 2011 release.