Steve Coogan (Night at the Museum: Battle of the Smithsonian) has joined the cast of ‘My Idiot Brother’. ‘My Idiot Brother’ is already shooting in New York, and stars Paul Rudd, Elizabeth Banks, Zooey Deschanel, Emily Mortimer, Rashida Jones, Hugh Dancy, Kathryn Hahn, Shirley Knight and Janet Montgomery. Coogan will play the role of “a self-righteous documentary filmmaker”. In the film, Paul Rudd plays a man trying to get away from his overbearing mother. During that time, he stays with each of his three sisters (played by Elizabeth Banks, Zooey Deschanel and Emily Mortimer).