Don Grady

Don Louis Agrati , better known as Don Grady, was an American actor, composer, and musician. He was well known both as one of Mickey Mouses Mouseketeers, and as Robbie Douglas on the longrunning ABCCBS television series My Three Sons. His sister was also an actress, billed as Lani OGrady. Their mother was a talent agent, known as Mary Grady.

Grady was born Don Louis Agrati in San Diego, California, the son of Mary B. , a talent agent, and Lou Anthony Agrati, a sausage maker. He grew up in Lafayette, California, where he was a class president at Lafayette Elementary School Stanley Junior High School, where he spent only a few months before being signed by Walt Disney and leaving the area and Burbank High School .

Source: Wikipedia