Celebritydeaths.net

June 27,2012: Don Grady, 68, US child actor and musician, born Don Louis Agrati, who began as a Mousketeer on The Mickey Mouse Club and starred as eldest brother Robbie in My Three Sons. He later played in the bands Geef and The Yellow Balloon, and wrote the music for the film Switch and the theme for The Phil Donahue Show.
Link: SF Chronicle