
Marguerite McNamara (June 18, 1928 – February 18, 1978) was an American stage, film, and television actress and model from the United States. McNamara began her career as a teenage fashion model. She first came to public attention as Patty O'Neill in the 1951 national tour of F. Hugh Herbert's The Moon Is Blue which ran concurrently with the original Broadway production. In 1952 she succeeded Barbara Bel Geddes in that role in the Broadway production. Both productions were directed by Otto Preminger, and Preminger also directed McNamara in that role in the controversial 1953 film adaptation of that work. She earned an Academy Award nomination for Best Actress for her role in the film.
From Wikipedia.

The Cardinal
1963 · as Florrie Fermoyle

Three Coins in the Fountain
1954 · as Maria Williams

The Moon Is Blue
1953 · as Patty O'Neill

Preminger: Anatomy of a Filmmaker
1991 · as actress 'The Moon Is Blue' (archive footage) (uncredited)

The Girl on The Roof
1953 · as A tourist

Prince of Players
1955 · as Mary Devlin Booth