Mickey Rooney Jr., original Mouseketeer dies at 77

Mickey Rooney Jr. is the eldest son of legendary star Mickey Rooney

Mickey Rooney Jr. is an original Mouseketeer, musician and actor

Paul Peterson announced the death of Rooney Jr.

Paul Peterson is the former actor and founder of the advocacy group A Minor Consideration

The cause of death of Mickey Junior is not specified

Rooney Jr. died on Saturday at his Glendale, Arizona, home

Rooney Jr. was born in Birmingham, Alabama

In 1955, Rooney Jr. and his brother Tim Rooney were hired as backup cast members on ABC’s "The Mickey Mouse Club"

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