The rock singer is performing a song for the soundtrack, which will be on sale in September. Vedder has already recorded songs for other Penn films, including 1995’s Dead Man Walking and 2001’s I Am Sam.
The film Into the Wild will open in theatres on September 21 in North America. The feature film stars Emile Hirsch, Vince Vaughn, Catherine Keener and William Hurt.
Eddie Vedder and Sean Penn have been friends for more than ten years.