Hollywood is full of temptation and many actors and actresses end up cheating on their partners. Here a couple who ended up cheating on their significant other. Hugh Grant cheated on Elizabeth Hurley in 1995 but the pair still stayed together for 5 more years. Meg Ryan cheated on her husband Dennis Quaid with Russell Crowe, ending the marriage. Kristen Stewart cheated on Robert Pattinson with married director Rupert Sanders.