A leading lady can also be an actress of renown. For example, Lynn Fontanne and Helen Hayes were both referred to as the 'leading lady of the theatre' in their time. Similarly, Mary Pickford was called the 'leading lady' of the cinema.
The epithet has been applied to an actress who is often associated with one particular actor, for example, Olivia de Havilland was Errol Flynn's leading lady in several films, Katharine Hepburn had a similar association with Spencer Tracy, and Lauren Bacall with Humphrey Bogart. A leading lady is also an actress who is typecast in romantic supporting roles.
The term is also used collectively, as in 'Hollywood's leading ladies' to refer to a group of notable, famous or popular actresses.