7. Jude Law and Sienna MillerPhoto: classicalite.com
The two British actors had been dating for 2 years and were engaged for a short time. In 2005, Sienna found out that Jude had an affair with the nanny who took care of his children. She called off the wedding. A few years later in 2009, they thought they could make it work again. But they decided against it in 2011.