Emma Corrin

Newcomer Emma Corrin cast as Princess Diana

Netflix confirmed the decision in a press release, adding filming will begin later this year.

In an accompanying quote, Corrin said she was "beyond excited" to be joining the show - a dramatised history of the British monarchy.

"Princess Diana was an icon, and her effect on the world remains profound and inspiring," she said.

The Crown's creator Peter Morgan described Corrin as a "brilliant talent" who "immediately captivated" casting directors.