My Best Friend's Girl is a 2008 American romantic comedy film by Howard Deutch and stars Dane Cook, Kate Hudson, Jason Biggs, Diora Baird, Alec Baldwin, Riki Lindhome and Lizzy Caplan. It was released on September 19, 2008. The film received generally unfavorable reviews from critics and grossed $41 million. As of 2024, it is the last film Deutch has directed.

Dane Jeffrey Cook is an American stand-up comedian and film actor. He is known for his use of observational, often vulgar, and sometimes dark comedy. He released six comedy albums: Harmful If Swallowed (2003), Retaliation (2005), Vicious Circle (2006), Rough Around the Edges: Live from Madison Square Garden (2007), and Isolated Incident (2009).