Switch, The (film) Neurotic Wally Mars is a financial success in New York with his stock trading partner Leonard, but still he has a gloomy perspective on the world. The one bright spot is his girlfriend, Kassie, who, unfortunately for Wally, just wants to be friends. Even when she decides she wants a child, she searches elsewhere for Mr. Perfect Sperm Donor. Seven years later, Kassie has a precocious son, Sebastian, who hits it off with Wally. They are so much alike that Wally becomes convinced that Sebastian is his son and wonders if he might have hijacked Kassie’s pregnancy. A Miramax film released on August 20, 2010. Directed by Josh Gordon and Will Speck. Stars Jason Bateman (Wally Mars), Victor Pagan (Knit Hat Guy), Jennifer Aniston (Kassie Larson), Jeff Goldblum (Leonard), Juliette Lewis (Debbie), Patrick Wilson (Roland), Thomas Robinson (Sebastian). 101 min. Filmed in CinemaScope in New York City.