Roman studied acting at the Bishop Lee Dramatic School and worked on stage before becoming a leading lady of Hollywood films in the mid '40s. (She later moved into character roles.) The film for which she first received good reviews and critical attention was Champion (1949). She tended to play determined, strong-willed characters who are cold externally but inwardly passionate. She is best remembered for her starring role in Hitchcock's Strangers on a Train (1951) opposite Farley Granger. During the rest of the '50s she primarily appeared in routine films. She has also done much TV work, including the series The Long Hot Summer.