Donald John DeFore (August 25, 1913 – December 22, 1993) was an American film, radio and television actor.
He was born in 1913 in Cedar Rapids, Iowa to Joseph Ervin DeFore (1878 – 1942), a railroad engineer, and Albina Sylvia Nezerka (1883 – 1975).
DeFore's film appearances include: The Male Animal (1942), The Human Comedy (uncredited, 1943), A Guy Named Joe (1943), Thirty Seconds over Tokyo (1944), The Affairs of Susan (1945), You Came Along (1945), It Happened on 5th Avenue (1947), Ramrod (1947), Romance on the High Seas (1948), My Friend Irma (1949), Too Late for Tears (1949), Dark City (1950), Southside 1-1000 (1950), The Guy Who Came Back (1951), A Girl in Every Port (1952), Jumping Jacks (1952), Battle Hymn (1957), A Time to Love and a Time to Die (1958), and The Facts of Life (1960). In 1946 exhibitors voted him the fourth-most promising "star of tomorrow".
DeFore is best known for his television work. Beginning in 1952, DeFore had a recurring role as the Nelsons' friendly neighbor "Thorny" on the comedy series The Adventures of Ozzie and Harriet. On May 6, 1953, he was the honoree on TV's This Is Your Life, a show that surprised the honoree on nationwide live TV with
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