Walter Becker's latest comedy has picked up another brilliant actor. According to The Hollywood Reporter, Matt Dillon is joining the cast of Old Dogs.

The screenplay, written by David Diamond and David Weissman, follows the adventures of two divorced dads played by John Travolta and Robin Williams. They are suddenly forced to care for their kids for two straight weeks.

Dillon is playing Barry, an overzealous summer camp captain who thinks the two men are gay lovers who have adopted twins.

The film begins shooting this summer.

Old Dogs was released November 25th, 2009 and stars John Travolta, Robin Williams, Kelly Preston, Conner Rayburn, Ella Bleu Travolta, Lori Loughlin, Seth Green, Bernie Mac. The film is directed by Walt Becker.