Joan Fontaine starred in almost 45 films throughout the course of a five-decade career. Name her main rival, who was also her sister.
Answer Olivia de Havilland
Joan Fontaine was Olivia de Havilland's younger sister. At the height of Fontaine's career, their rivalry was documented in the media and caused quite a controversy.
Asked by Vasilii Kulev · Last updated 4 years ago · 100.7K views · SOURCE