Jacqueline Bisset
Although Jacqueline Bisset has never married, she has still been in several long-term relationships, some of which certainly have outlasted many actual marriages, especially celebrity marriages. She has had three relationships that lasted 7 years and one that’s lasted 14 years! It’s safe to say that she is a serial monogamist.

Jacqueline Bisset
Kimberly Stewart
It was reported in 2011 that Kimberly Stewart, Rod Stewart’s daughter, had a baby with actor Benicio del Toro, despite the fact that they were not even in a relationship at the time. She was also engaged to reality star Talan Torriero when she was 26, but the two called off the engagement just two weeks later.

Kimberly Stewart