Miley and Liam fell in love while shooting The Last Song three years ago, but they weren't the first ones to cultivate romance on the set. Brad Pitt and Angelina Jolie famously discovered their chemistry during the making of Mr. and Mrs. Smith. Prior to that, Brad's role in Seven led to a six month engagement to Gwyneth Paltrow, who played his wife in the movie.
Twilight stars Robert Pattinson and Kristen Stewart decided to give real-life dating a shot after their steamy scenes in the popular vampire franchise. And Andrew Garfield knew that Emma Stone was the girl for him even before shooting. The Amazing Spider-Man star says it felt like he "woke up" the first time he met Emma during their audition.