[Liz]

There’s an awful lot of pictures of the “two” feuding sisters together.....at different stages of their lives....young, old and in between.

[fieldmarshaldj]

http://www.hollywoodreporter.com/race/joan-fontaine-olivia-de-havilland-666087

This article provides a bit more insight. In short, it described their relationship as running hot and cold. Apparently, what put it on ice for the latter decades had to do with their mother’s death.