Hollywood is famous for its on-screen romances, but sometimes, the sparks fly off set too. When actors cross the line with their co-stars, it leads to real-life affairs that shock fans and shake up the industry. These steamy encounters reveal just how irresistible on-set chemistry can be, turning scripted passion into real-life scandals that leave everyone talking. Here are the most jaw-dropping stories of actors who couldn’t resist temptation.