Delivery Man (2013)

Synopsis: An affable underachiever finds out he's fathered 533 children through anonymous donations to a fertility clinic 20 years ago. Now he must decide whether or not to come forward when 142 of them file a lawsuit to reveal his identity.

Director: Ken Scott

Writers: Ken Scott (screenplay), Ken Scott (original screenplay "Starbuck")

Stars: Vince Vaughn, Chris Pratt, Cobie Smulders

(http://www.imdb.com/title/tt2387559/)