Don Agrati

Don Grady (born Don Louis Agrati; June 8, 1944 – June 27, 2012) was an American actor and musician. He was best known as one of the Mouseketeers on the Mickey Mouse Club, and as Robbie Douglas on the long-running ABC / CBS television series My Three Sons. During his short-lived career in music he was a solo singer and the drummer for the pop band The Yellow Balloon.