Mouseketeer
The Mickey Mouse Club has brought a long list of child actors to the Hollywood scene. Even the young Johnny Crawford once wore the Mickey Mouse ears as one of the 24 original members. However, he was cut one year later after the membership age was reduced to just 12 years old. Shortly thereafter he was cast in a live broadcast of Little Boy Lost, and then later a small role on The Lone Ranger. All of which he did before landing the part on The Rifleman at the young age of 12 years old.