Bull was born on June 26, 1924 in Zion, Illinois. After years of living in Los Angeles, he moved back to Chicago in 1994 with his wife Barbara Collentine. The couple moved to the Motion Picture & Television Fund home from Chicago in September 2012.
Bull died on the morning of February 3, 2014, at the Motion Picture Television Fund campus in Calabasas, California of pneumonia. He was 89 years old.