Troy Donahue was a journalism student at Columbia University when he began playing in stock productions. He made his film debut in Man Afraid (1957) and in 1959 signed as a contract player with Warner Bros., which promoted him to stardom with A Summer Place (1959) that year. He was soon a teenage heartthrob, his blond hair and blue eyes appearing frequently on the covers of movie magazines. His most successful film was Parrish (1961), in which he played the title character. A few years after that his career went into a decline; he made only a few television movies between the mid-'60s and his small role in The Godfather Part II (1974) (in which his character's name, Merle Johnson, was actually his real name). His later films were almost entirely for the low-budget home video market, e.g., Sexpot (1990) and Nudity Required (1989).

On August 30, 2001, Donahue suffered a heart attack and was admitted to the hospital in Santa Monica, California. He died three days later on September 2 at the age of 65.