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John Ernest Crawford (March 26, 1946 – April 29, 2021) was an American actor and singer. He first performed before a national audience as a Mouseketeer. At age 12, Crawford rose to prominence playing Mark McCain in the series The Rifleman, for which he was nominated for a Best Supporting Actor Emmy Award at age 13. Crawford had a brief career as a recording artist in the 1950s and 1960s. He continued to act on television and in film as an adult. Wikipedia