Emile Hirsch has joined the burgeoning cast of Savages for director Oliver Stone, although it isn't known what role he will play.

The story centers on two Laguna Beach weed dealers (Taylor Kitsch and Aaron Johnson) who come up with a crazy scheme to get their kidnapped girlfriend back from a Mexican drug cartel who is trying to muscle them out of business.

We reported yesterday that Blake Lively will play the drug dealers' shared girlfriend, O. Salma Hayek will play the head of the cartel, while Benicio Del Toro plays the cartel muscle. John Travolta and Uma Thurman are also in talks to star as a DEA agent and O's mother, respectively.

Oliver Stone will direct from a screenplay by Shane Salerno, which is adapted from the Don Winslow novel. Production is scheduled to start sometime this summer.