Helena Bonham Carter, Logan Lerman, and Gerard Depardieu have confirmed that they will lend their voices to the animated film Sgt. Stubby: An American Hero. The film is directed by Richard Lanning and written by Mike Stokey. The film is based on a true story and tells the story of a stray dog named Stubby who was rescued by an American soldier and later became a heroic dog in World War I.