Fess Parker -- who played Davy Crockett and Daniel Boone -- has died of natural causes ... a rep confirms with TMZ.
Parker -- who also starred in "Old Yeller" -- owned the DoubleTree Resort in Santa Barbara and the Wine Country Inn & Spa in Los Olivos, CA.
Parker married Marcella Rinehart in 1960. They had two kids.
He was 85.