Joan Fontaine, the talented actress known for her roles in classic films like "Rebecca" and "Suspicion," had a notoriously strained relationship with her sister, Olivia de Havilland.

Olivia de Havilland was also a successful actress in her own right, appearing in iconic films such as "Gone with the Wind" and "The Heiress." Despite their shared success in Hollywood, the sisters had a long-standing feud that played out in the public eye.

Their rivalry reportedly began in childhood and continued throughout their adult lives, with both actresses vying for roles and awards. The tension between the two sisters reached a peak when they were both nominated for the Best Actress Oscar in 1942, with Fontaine ultimately winning for her performance in "Suspicion."

Throughout their careers, the sisters rarely spoke to each other and often made public digs at one another. Their feud was well-documented in the tabloids and has become a part of Hollywood lore.

Despite their strained relationship, both Joan Fontaine and Olivia de Havilland were incredibly talented actresses who left a lasting impact on the film industry. Their performances continue to be celebrated and studied by film buffs and critics alike.

To learn more about Joan Fontaine and Olivia de Havilland's complicated relationship, you can visit Biography.com or IMDb for more information.

In conclusion, the name of Joan Fontaine's actress sister with whom she had a notoriously bad relationship was Olivia de Havilland. Despite their feud, both sisters were incredibly talented actresses who left a lasting legacy in Hollywood.

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