Walker, 40, was a passenger in a Porsche sports car driven by a friend - who also died - when it crashed north of Los Angeles. Walker was said to be attending a charity event at the time.
He starred in all but one of the films in the Fast & Furious franchise, the sixth of which opened in May. Walker also starred in the suspense drama Hours, a movie that is set for release this month.
The Los Angeles County Sheriff's department said the crash happened in the community of Valencia.
