Chris Pratt to Defend Vince Vaughn in Starbuck

Actor Chris Pratt arrives to The Paley Center for Media's PaleyFest Honoring "Parks and Recreation" at Saban Theatre on March 6, 2012 in Beverly Hills, California. Photo: Michael Buckner/2011 Getty Images

Chris Pratt is eyeing a co-starring role in Vince Vaughn's Starbuck, about a man who anonymously fathers more than 500 children via sperm donation. When 142 of the families file suit to learn the Starbuck's identity, Pratt's character, a lawyer and single father of four, comes to his aid. The film, an adaptation of a 2011 French-Canadian comedy, will be penned and directed by original writer-director Ken Scott.