Honorary mayor of Granada Hills, California during the 1960s.
In the final release print of 1951's Show Boat (1951), Wilcox, as a poker player, had no lines -- unusual for a familiar supporting actor who usually had a speaking part. But his role may have been a little more substantial in the rough cut, because the scenes of Gaylord Ravenal and Magnolia's "winning streak" in Chicago were trimmed some after it was decided that they slowed down the film.
Served on the Screen Actors Guild Board of Directors.
Studied at the Pasadena Community Playhouse alongside George Reeves, who was among his closest friends. He was best man at Reeves's wedding and they appeared in eleven films together.