Veteran stage and screen star Hume Cronyn, best known to modern-day audiences for his role in Cocoon and his on and off-screen love affair with late wife Jessica Tandy, died of prostate cancer Sunday at his home in Fairfield, Conn. He was 91. Cronyn whose career spanned six decades and included Broadway, film and TV won an Emmy in 1994 for the CBS Hallmark Hall of Fame movie To Dance with the White Dog. He was nominated for an Oscar in 1944 for his performance in The Seventh Cross and picked up a Tony in 1964 for playing Polonius in Hamlet. In addition to three children, Cronyn is survived by wife Susan Cooper Cronyn, whom he married in 1996.