film insurance would not allow her to dive into the water so that was her stuntwomen with a nice arse who dived in. the previous clips up to that point is 100% portman arseI am not so sure. Indeed, I have also read she had a body double for this scene. But not a butt double, just someone to dive into the lake for her because the water was very cold. So for me, it really her butt. And after all she had already shown it in other movies, so why not here?

