Since Amanda Seyfried and Justin Long got together last Summer, they have showed off their silly sides together. From goofing off in celebrity charades to taking funny photo-booth snaps, they know how to make each other laugh. On the flip side, they also cuddle up in sweet moments, whether they're watching the US Open or walking Amanda's dog, Finn. They didn't make their red carpet debut until last month, but they've been showing their love for one another for much longer than that. To celebrate Justin Long's birthday this week, relive their cutest moments — so far!