Alan Arkin's off to City Island

Indie comedy City Island is nabbing a few more thesps to join a cast that already includes 10,000 BC’s Steven Strait and Andy Garcia.

Alan Arkin, Emily Mortimer and Julianna Margulies have all signed on to the film in which a prison official (Garcia) discovers that one of the cons under his charge is his son. He tries – comically, apparently - to become the guy’s guardian.

The Hollywood Reporter is counting heads .