Pearl Jam frontman Eddie Vedder is to release his first solo album as a film soundtrack for pal Sean Penn's new movie Into The Wild. The Alive rocker has reportedly written solo tracks for the actor/director's new film, which stars Emile Hirsch. Oscar-winning composer Gustavo Santaolalla has also contributed to the film's score. The project, which will hit cinemas in September (07), is based on John Krakauer's novel about Alaskan adventurer Christopher MCCandless. Much of the film was shot in Vedder's adopted hometown of Seattle, Washington and the rocker reportedly makes a cameo in the movie. Vedder previously wrote songs for the film Dead Man Walking and covered The Beatles' You've Got To Hide Your Love Away for I Am Sam - both films starred Penn.