Joseph Gordon-Levitt's 31st Birthday: Relive His '500 Days Of Summer' Dance

Break out your guitar and put the cutest thing you can possibly imagine on YouTube, it's Joseph Gordon-Levitt's 31st birthday!

JGL has had quite the year -- he starred in everyone's favorite indie cancer dramedy, sweetly revamped an R. Kelly ditty and has been romping around town with the caped crusader.

And the good times don't stop at 30 -- 2012 is ushering in the JGL, action star! Having paid his dues in psychological thrillers, Jo-Go will get muscular in "Premium Rush," and then "Looper," which links the indie darling with action hero vet, Bruce Willis.

But before all that, let's celebrate with romcom JGL. Voila, the satirically saccharin dance sequence courtesy of "500 Days of Summer." (This kid, he even puts that little birdie to shame.)