Though hot young actor Michael Cera still hasn’t made up his mind about doing the Arrested Development movie, the actor will be in the movie if his on-screen grandfather has anything to say about it.

Jeffrey Tambor, the egocentric George Bluth Sr. on Arrested, recently took part in a staged reading at the Upright Citizens Brigade theatre in Los Angeles. He performed material from the animated PBS series Word Girl alongside Dannah Feinglass and Chris Parnell.

Regarding the much-discussed Arrested movie, the actor told the Daily News that it’s definitely happening and that Cera will be in it. Tambor said, “If I have to call him up and say, ‘Get on set right now, young man,’ he’ll be there… The movie is going to happen this year, and Michael Cera is on board. Trust me.”

Does “Grandfather know best”? Does he really have the final word?