Don Grady, who played handsome Robbie Douglas on My Three Sons, died at 68 Wednesday, RadarOnline.com has learned.
Grady's co-star Barry Livingston told the AP the actor had been battling cancer, and was getting in-home hospice care at his Thousand Oaks, California home.
"It's the oldest cliche in the world when TV brothers start referring to each other like biological brothers," Livingston said, "but he was the oldest, and somebody I looked up to and learned from a great deal about life."
The show biz vet, born Don Louis Agrati, had a storied career, as he nabbed a spot on The Mickey Mouse Club at 13, and also did extensive work in music.
My Three Sons spanned 380 episodes on ABC and CBS from 1960 until 1972.