Grady also appeared in other shows, including The Rifleman and Wagon Train, and formed a pop singing group, the Yellow Balloon.He is survived by his wife and two children.

Don Grady, big brother Robbie ... Grady appeared with a band, the Greefs, in the series, and in real life played drums for The Yellow Balloon, who had a minor hit with a self-titled song in 1967.

A musical prodigy from a young age, Grady appeared with a band, the Greefs, in the series, and in real life played drums for The Yellow Balloon, who had a minor hit with a self-titled song in 1967.

Don Grady, who played Robbie Douglas on "My Three Sons" after serving as one of "The Mickey Mouse Club's" original Mouseketeers and went on to a career as a musical performer and composer for ...

Actor Don Grady ("My Three Sons"), shown in 2003, was 68. ... Grady appeared with a band, the Greefs, in the series, and in real life played drums for The Yellow Balloon, ...

A musical prodigy from a young age, Grady appeared with a band, the Greefs, in the series, and in real life played drums for The Yellow Balloon, who had a minor hit with a self-titled song in 1967.

THOUSAND OAKS, Calif. — Don Grady, who was one of television's most beloved big brothers as Robbie Douglas on the long-running 1960s hit "My Three Sons," died Wednesday. He was 68. His "My Three ...