The veteran Hollywood actor, son of screen legend Henry Fonda and brother of actress Jane Fonda, died in August at the age of 79. A rep for the Easy Rider and counterculture icon confirmed that his cause of death was "respiratory failure due to lung cancer," adding, "In one of the saddest moments of our lives, we are not able to find the appropriate words to express the pain in our hearts. As we grieve, we ask that you respect our privacy."