Mason Cook will join Eddie Izzard (as Grandpa) and Charity Wakefield (Marilyn).
Sets are currently being built on the Universal lot for Mockingbird Lane, which comes to us from Bryan Fuller. Brian Singer (X-Men) is directing the pilot. Fuller is also overseeing the development of Hannibal for NBC with David Slade directing.
Cook starred in Spy Kids: All the Time in the World in 4D and appears in the upcoming The Lone Ranger.