It seems the set of a new film production has just grown by four. According to The Hollywood Reporter, Bob Balaban, Lea Thompson, Michelle Arthur and David Harbour have signed on to The Convincer.

The four new actors join the previously-announced cast of Greg Kinnear, Alan Arkin and Billy Crudup. The film centers on a downtrodden insurance salesman who is desperately trying to get a hold of a rare violin.

Jill Sprecher is directing the film from a script she wrote with Karen Sprecher. The film is currently in production, with filming taking place in various locales around Minneapolis and St. Paul, Minnesota.