Cobie Smulders in Talks for Vince Vaughn Comedy

NEW YORK, NY - APRIL 28: Actress Cobie Smulders attends the "Marvel's The Avengers" Premiere during the 2012 Tribeca Film Festival at the Borough of Manhattan Community College on April 28, 2012 in New York City. (Photo by Slaven Vlasic/Getty Images) Photo: Slaven Vlasic/Getty Images

Avengers and How I Met Your Mother star Cobie Smulders is in talks to co-star opposite Vince Vaughn in his upcoming sperm-donor movie Starbuck, THR reports. Vaughn plays a man who discovers that he's fathered over 500 children, and Smulders would play his pregnant girlfriend, who's unaware of her boyfriend's prodigious paternity.