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Bonham Carter officially joins The Crown

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Helena Bonham Carter attending the EE British Academy of Film awards (BAFTA) at the Royal Albert Hall, London. (Doug Peters/PA)

Netflix has at long last confirmed that Helena Bonham Carter will join season three of The Crown, with the streaming giant also announcing that Jason Watkins is also joining the critically acclaimed series.

Bonham Carter will play Princess Margaret, taking over the role played for the first two seasons by Vanessa Kirby.

"I'm not sure which I'm more terrified about - doing justice to the real Princess Margaret or following in the shoes of Vanessa Kirby's Princess Margaret," the actress said. "The only thing I can guarantee is that I'll be shorter [than Vanessa]."

She will next be seen in the film Ocean's 8. Bonham Carter is known for her role as Bellatrix Lestrange in the Harry Potter franchise, as well as several collaborations with Tim Burton.

Watkins, meanwhile, will play Harold Wilson. Wilson was the Prime Minister of the United Kingdom from 1964 to 1970 and again from 1974 to 1976.

"I am delighted to become part of this exceptional show," Watkins said.

"Harold Wilson is a significant and fascinating character in our history. So looking forward to bringing him to life, through a decade that transformed us culturally and politically. And excited to be working so closely with Olivia; and the whole team."

Season three is slated to debut in 2019.

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