All rise for Her Majesty Imelda Staunton!
Staunton, who played Dolores Umbridge in the Harry Potter films, is taking over from Olivia Colman and Claire Foy for the royal drama's final two seasons.
Staunton, 65, is shown with the monarch's signature hairdo, wearing a yellow dress and clutching a handbag.
Season 4 ended with Princess Diana (Emma Corrin) looking very unhappy in her marriage to Prince Charles (Josh O'Connor) despite the best efforts of the queen (Colman) to keep them together.
It's expected the show's final seasons will cover the couple's divorce, as well as the deaths of Diana, the Queen Mother, and Princess Margaret, the queen's sister.
Australian actor Elizabeth Debicki will take over from Corrin as Diana, while Dominic West will play Charles.
Game of Thrones actor Jonathan Pryce will portray Prince Philip, taking over from Tobias Menzies, while Lesley Manville will follow in the footsteps of Helena Bonham Carter as Margaret.
Earlier this month, the cast of Season 4 was showered with Emmy nominations, including one for Outstanding Drama Series.
No word yet on when to expect Season 5 to premiere.