“They had this deep love for each other, but they also competed with each other.”

According to Joan, Jackie was one of her biggest fans when she started acting in the early 1950s.

“I feel so inferior.”

Joan Collins and Jackie Collins smiling

Soon after, Jackie was motivated to get cosmetic surgery to change the shape of her nose.

While Jackie started out as an actor, it was happenstance because she was living with Joan.

“I always wanted to be a writer,” Jackie informedThe New York Timesin 2007.

Jackie and Joan Collins smiling together

Around this time, Joan also began working as a writer, starting with a memoir.

In 1988, Joan published her first novel, igniting media claims of friction between her and Jackie.

“I was never jealous of my sister,” Jackie asserted in 2011 (viaThe Times).

Jackie and Joan Collins smiling together

One of their biggest sources of friction was Jackie’s dislike of Joan’s fourth husband, Peter Holm.

“She begged me not to marry him.”

The marriage lasted about two years, and they split after Holm cheated on Joan.

Joan dated Hurlstone for over a decade.

When Jackie died from breast cancer in 2015, Joan was shocked.

Jackie felt protective towards Joan and decided not to tell her about her diagnosis until weeks before she died.