This is from Wikipedia on Convy's early career:
Convy started his career in the entertainment business as a featured performer and singer in the Billy Barnes Revues of the 1950s and 1960s. He appeared in the 1961 Warner Brothers drama Susan Slade, playing Troy Donahue's rival for the affections of Connie Stevens. Convy went on to became a Broadway actor, starring in Fiddler on the Roof (1964), The Impossible Years (1965), and Cabaret (1966). He also appeared in the Roger Corman film A Bucket of Blood, playing Lou Raby; and the soap opera Love of Life, playing Glenn Hamilton, a rapist.