If there's one thing we love more than watching a movie starring two hot leads, it's watching a movie starring two hot leads who are totally dating IRL. It's like that old saying: "if the on-camera chemistry between two actors is electric, they're probably a couple." What? That's not a saying? Agree to disagree.

While some of these couples have since crashed and burned, others are still going strong. From Brangelina to Blyan (Blake + Ryan, duh), here are 19 hot celebrity couples who met on set.