Jojo Rabbit might be a comedy, but Thomasin wanted to ensure that she was being as respectful as possible as she played a character in Nazi Germany. To prepare for the movie, she read The Diary of Anne Frank and watched movies like Schindler's List and Life Is Beautiful.
"I went into the whole project aware that it was something that had to be approached with a lot of care and sensitivity, given the subject matter," she told the LA Times. "Even though it was a comedy, you still had to put the work in. I read a whole lot of books and I did a lot of research . . . It helped me understand all that she had gone through."
To deepen her knowledge, she toured the Jewish quarter in Prague (where the movie was filmed) with a historian and also toured Theresienstadt, a former concentration camp in the Czech Republic.