Appeared with her future husband Michael Wilding in the Hitchcock film Under Capricorn (1949). After their marriage in 1964, they worked together several more times, but, by his own admission, Wilding preferred retirement and was happy just to be a supportive audience member for his wife.
Her frequent co-star on both stage and screen was Ralph Richardson. She played Roxane to his Cyrano in the 1946 London stage revival of "Cyrano de Bergerac", one of Richardson's greatest stage successes.
She suffered from claustrophobia for most of her life.
Won two Tony Awards for Broadway performances as Best Actress (Dramatic): in 1957 for "Separate Tables" and in 1962 for Tennessee Williams' "The Night of the Iguana." She also received two other nominations in the same category: in 1960 for Shakespeare's "Much Ado About Nothing" and in 1963 for "Tchin-Tchin."