Daughter Deborah Blossom tells the Los Angeles Times that her father died of natural causes July 8 at a Santa Monica nursing home.
Blossom starred on Broadway, as well as in television and movies. He won three Obie Awards for his off-Broadway work.
Movie credits include "The Hospital," ''Slaughterhouse-Five," ''The Great Gatsby," ''Close Encounters of the Third Kind," ''Escape From Alcatraz," ''Resurrection" and "Doc Hollywood." Blossom had a starring role in the 1974 cult horror movie "Deranged."
But he may be best-remembered as the neighbor in 1990's "Home Alone"
Blossom's TV credits include "Another World," ''Moonlighting," ''Northern Exposure" and "In the Heat of the Night."
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