THR is reporting Maya Rudolph and Terry Crews have joined the voice cast of animated feature The Willoughbys , along with Martin Short, Jane Krakowski and Sean Cullen . The newcomers join previously announced star and producer Ricky Gervais , who will narrate the Bron Studios animation that is based on the popular children's book by The Giver author Lois Lowry. The Willoughbys follows four kids — Tim, Jane and the twins — after they are abandoned by their selfish parents and embark on a wild adventure into the world, where they find a new modern family of their own. Short and Krakowski will voice Father and Mother Willoughby, parents so in love with each other they forget they even have children, while Rudolph will be the voice of the kindly Nanny, and Crews will play the candy mogul, Commandor Melanoff. Cullen will voice Willoughby twin boys, Barnaby A and B. Aardman and Sony grad Kris Pearn adapted and will direct the feature with co-director Cory Evans. Brenda Gi