For some of us, Joseph Gordon-Levitt stole our hearts in 10 Things I Hate About You and 3rd Rock From the Sun, and for others, those feelings weren't discovered until he starred in (500) Days of Summer. Whenever your JGL crush began, I think it's safe to say that we never quite got over him. There's something about his endearingly sweet yet down-to-Earth-personality that makes loving him so easy. If you forgot how adorable he is, scroll ahead to see the 20 GIFs that will make you fall for him again.