Dorothy McGuire(1916-2001)

Brought to Hollywood by producer David O. Selznick (who called her "a born actress") on the strength of her stage performance, McGuire starred in her first film, a movie adaptation of her Broadway success, Claudia, and portrayed the character of a child bride who almost destroys her marriage through her selfishness. Her inaugural screen performance was popular with both the public and critics alike and was the catalyst for not only a sequel, Claudia and David (both movies co-starring Robert Young), but also for numerous other film roles.

To this day, I don't know what shapes a Hollywood career.