Spotted! The Olsen Twins' younger sister Elizabeth Olsen and Dakota Fanning, out biking together! In fact, they did it on set, since they're both starring in this upcoming movie 'Very Good Girls'. The movie is about two New York City girls (Liz and Dakota) who both fall for the same street artist, and much more about the life of being an American teenage girl. It's due in 2013, and we can't wait to see it! Hopefully Dakota will play a little more grown up role in this movie, and we're not gonna miss that!