The Crown has released a peek at Helena Bonham Carter as the British monarch's rebellious and sometimes controversial younger sister Princess Margaret Dave Quinn is a Senior Editor for PEOPLE.

This story contains spoilers for season three of The Crown. If you do not want to be spoiled, click away now. Season three of The Crown opens with a lesson. Princess Elizabeth’s lesson.

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Season three of Netflix’s The Crown is coming this week, and with it Helena Bonham Carter’s performance as the sister who always lived in the Queen’s shadow. To celebrate the return of the ...

Princess Margaret, the Countess of Snowdon, was a member of the English royal family. She was the daughter of King George VI and Queen Elizabeth and the younger sister of Queen Elizabeth II.