Bradley Cooper has joined the cast of the horror/thriller, Case 39 for Paramount Pictures.

Renee Zellweger and Ian McShane star in the film that centers on a social worker (Zellweger), who saves an abused girl from her parents but later discovers things are not as they seem. Variety reports Cooper will play a detective who is the love interest of Zellweger's character.

Christian Alvart is directing Case 39, which starts shooting September 5th in Vancouver; a 2007 release has been scheduled.