3. Sarah Jessica Parker and Robert Downey Jr.

Between the years of 1985 and 1992, Jessica Parker and Robert Downey Jr. had a bit of a rocky, close-knit relationship. During their 7-year years together, they seemed pretty serious. The two even lived together for a few years in a 2-story Hollywood apartment. Sadly, their partnership came to an end with theories pointing at Robert’s drug issues as a fault.