The long-awaited Family Guy movie will make its direct-to-DVD debut on Sept. 27. Family Guy Presents Stewie Griffin: The Untold Story finds the baby genius setting out on a road trip to track down his real father. Per The Hollywood Reporter, Beverly Hills, 90210 grads Jason Priestley, Jennie Garth and Tori Spelling will be featured in "a special gag" that is both funny and mean.