4. Robin Williams
The late Robin Williams had been married to Valerie Velardi for almost a decade when he started to fall for their son’s nanny, Marsha Garces. His relationship with Garces led to the end of his marriage with Velardi.
The attraction between the actor and the nanny grew deeper, and a year after his first divorce, the two got married. Garces was then pregnant with their daughter Zelda. Their relationship turned out to be more than just an affair, but after more than 20 years of marriage, it ended in divorce in 2010.