Gregory Harrison is a former 46-47-year-old child actor and occasional singer. As a farm boy, he only appeared in Kidsongs: A Day at Old MacDonald's Farm where he played Sean. He was best known in the songs: "Shortenin' Bread", "This Old Man", "John Jacob Jingleheimer Schmidt", "She'll Be Comin' Round the Mountain" and "Twinkle, Twinkle, Little Star". He was replaced by Chris Finch in 1986.
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