Emma Watson grew up making the Harry Potter films, they were actually the first films she ever made. Apparently, this means that the young actress had some bad habits that she had to break on the set. In a recent interview, the Beauty and the Beast actress admitted that she was so in love with the Harry Potter books, and so committed to doing a good job, that she essentially memorized the entire script, and had a tendency to mouth other people's lines along with them.
This is actually quite traumatic for me because I created issues because of this. I would ruin takes. Chris would be like, 'Cut, Emma. You're doing it again. You're mouthing Dan's lines.' ... I couldn't help myself. I was such a loser. I really love those books. I really wanted to do my job well, and I kind of overdid it.
We're not sure we'd classify the behavior as that of a "loser." Learning the lines of others is an important part of the performance, you have to know what they're saying in order to know what you're reacting to, right? Emma Watson discussed her bad habit on Jimmy Kimmel Live after Kimmel showed a screen test video of the three lead actors, Watson, Rupert Grint, and Daniel Radcliffe that was done for Harry Potter and the Sorcerer's Stone. Watson is positioned between her two male co-stars and when the two of them are speaking to each other, you can see Watson's lips moving along with their lines.
We could see how this could be a bit traumatic for a young girl who repeatedly sees takes thrown out because the camera catches her lips moving. Still, it is a clear indication that she was really focused on doing her job well, she ended up memorizing the entire script just to be sure she didn't miss anything. Get a look at the video in question below.
Emma Watson was put in the unenviable position of growing up in front of the world as part of the Harry Potter film franchise. She started out a child and was a young adult before it was all said and done. Watson became a star thanks to her role as Hermione Granger and that star hasn't fallen even a little bit since the series came to an end. Now, she's about to take the screen once again as the living embodiment of a Disney Princess as Belle in Beauty and the Beast.