John Fink (born February 11, 1940) is an American film and television actor. In the 1970–1971 the NBC sitcom Nancy, Fink was cast as an Iowa veterinarian, Dr. Adam Hudson, who marries the daughter of the President of the United States. The short-lived series starred Renne Jarrett (born 1946) as the title character and Celeste Holm and Robert F. Simon in supporting roles.