William Edward Hickey (September 19, 1927 – June 29, 1997) was an American actor. He is best known for his Oscar-nominated role as Don Corrado Prizzi in the John Huston 1985 film Prizzi's Honor, as well as Uncle Lewis in National Lampoon's Christmas Vacation (1989) and the voice of Dr. Finklestein in Tim Burton's The Nightmare Before Christmas (1993).