Underworld: Evolution is a 2006 American action horror film directed by Len Wiseman from a screenplay by Danny McBride, based on a story by Wiseman and McBride. It is the sequel to Underworld (2003) and the second installment in the Underworld film series. The film stars Kate Beckinsale, Scott Speedman, Tony Curran, Shane Brolly, Steven Mackintosh, Derek Jacobi, and Bill Nighy. The plot follows Selene and Michael, again played by Beckinsale and Speedman, respectively, as they fight to protect the Corvinus bloodline from its hidden past.

Underworld: Evolution premiered at the Cinerama Dome in Los Angeles, California on January 11, 2006, and was released in the United States on January 20, by Sony Pictures Releasing. The film received generally negative reviews from critics and grossed over $113 million worldwide against a production budget of $45 million.

The film was followed by the prequel Underworld: Rise of the Lycans in 2009 and later a direct sequel Underworld: Awakening in 2012.