It’s time to dig out the old photo albums—and check out the size of your smile. If you’d like to learn the likelihood you and your loved one will be living happily ever after, that is. Associate professor of psychology, Matt Hertenstein, and his team at DePauw University in Indiana recently made a remarkable love-related discovery: the bigger your childhood grin, the greater your chances of successful marriage. Youthful frowners, on the other hand, were five times more likely to file for divorce than their smiling counterparts. What’s the connection? Scientists hypothesize that happy people tend to wed partners with similarly positive emotionality and generally have greater support networks. So go ahead and smile for the camera!