Pamela Sue Martin (born January 5, 1953 in Westport, Connecticut), is an American actress, best known for playing Nancy Drew on The Hardy Boys/Nancy Drew Mysteries TV series and Fallon Carrington Colby on the night time soap opera Dynasty.

Martin began modeling at 17, and appeared in the original film version of The Poseidon Adventure (opposite Gene Hackman) at the age of 19. During the run of Nancy Drew she posed for the July 1978 issue of Playboy magazine.

1984, Ms. Martin did an on camera PSA to help save Pink Dolphins in the Amazon River. It was directed by Clyde Lucas, who appeared on The Hardy Boys/Nancy Drew Mysteries.

Twice divorced and the mother of one son, Martin has written about her struggle with interstitial cystitis. She has long been involved in environmental causes, and she owns a theatre company in Idaho.