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