William attended grammar and high schools in New York and New Jersey. Upon graduation, he enrolled at West Virginia University where he planned to study law and played football and tennis. One summer, his uncle got him a job at the Suffern County (in New York) Theatre. He worked with actors Broderick Crawford, George Tobias, José Ferrer and Kent Smith. After that experience, he decided to continue with theatre and left college and toured with "Tobacco Road". He had a brief stint with the Mercury theatre in New York and then left for Hollywood and was signed to an MGM contract. He was supposed to have made a movie with Esther Williams which never came about. Then it was off to the Army. Discharged in 1946, he spent three years with Columbia before freelancing. He starred for the entire run of the TV series It's a Great Life (1954).