Relationships are tough in Hollywood and these cheating scandals only strengthen that theory even more. For some affairs, they turned into long-lasting marriages like Daniel Craig and Rachel Weisz falling in love on the set of Dream House. Other relationships fall apart like Reese Witherspoon's marriage to Ryan Phillippe when he had an affair with Abby Cornish on the set of Stop-Loss. Check out the video above for more...

Reese Witherspoon and Ryan Phillippe were married from 1999 to 2007

Reese Witherspoon and Ryan Phillippe on the red carpet many years ago