British actress Imelda Staunton will play the Queen in the final season of award-winning television series The Crown, the show's creator says.
The Netflix series about the British royal family will end after five seasons rather than the six seasons originally envisaged, writer and executive producer Peter Morgan said on Friday.
Staunton, best known for playing the vindictive Ministry of Magic official Dolores Umbridge in the Harry Potter movies, will take over from Olivia Colman, who played the monarch in middle age in season three and the yet-to-be-released fourth season.
Staunton said in a statement she was "genuinely honoured" to be taking the show to its conclusion.
The Crown, whose first two seasons cost about $US130 million ($NZ201 million) to make, dramatises key events in the life and reign of Queen Elizabeth II, the world's longest-serving monarch.
Claire Foy, as the young queen, and Colman both won Golden Globes for their performances and the series has won multiple awards since it launched in 2016.
"At the outset I had imagined The Crown running for six seasons but now that we have begun work on the stories for season five it has become clear to me that this is the perfect time and place to stop," Morgan said in a statement.
