When asked why she took the role, Portman replied, "I just thought it sounded like a weird idea because Kenneth Branagh's directing it, so I was just like, 'Kenneth Branagh doing Thor is super-weird, I've gotta do it.'"
Ketika ditanya mengapa dia mengambil peran, Portman menjawab, "Saya hanya berpikir itu terdengar seperti ide aneh karena Kenneth Branagh mengarahkannya, jadi saya seperti ini, Kenneth Branagh melakukan Thor sangat aneh, saya harus melakukannya.'"