The ultimate betrayal! Check out the biggest celebrity cheating bombshells through the years -- including scandals involving Kristen Stewart, Tiger Woods, Katharine McPhee and Ashton Kutcher.
Ethan Hawke and Uma Thurman
Moving on! Ethan Hawke and Uma Thurman were married for six years and had two children before divorcing in 2004. Though Hawke has never claimed to have cheated on Thurman at the time, the actor did move on to marry the estranged couple's nanny Ryan Shawhughes four years later in 2008. Since then, Hawke and his new wife have also welcomed two children together.
Credit: Globe Photos; Humberto Carreno/Startraksphoto.com (inset)