The Switch

When his best friend Kassie (Jennifer Aniston) decides to become a single mother through artificial insemination, love-struck Wally Mars (Jason Bateman) drunkenly switches her donor's sperm sample with his own, leading to some vexing questions seven years later when Kassie returns to New York with a son who is singularly Wally-like. Patrick Wilson costars in this romantic comedy based on a short story by Jeffrey Eugenides.