The actress has revealed she was a guest of Her Majesty several years ago and slept in Prince Charles' rooms.
The actress is replacing Vanessa Kirby as Princess Margaret in the third series of Netflix show The Crown
The star was named best actress for her role in The Favourite.
The actress has bid farewell to her role as Princess Margaret as Helena Bonham Carter takes over.
The actor plays the late Royal in the new series of The Crown.
Helena Bonham Carter used rather unconventional methods to research for her role as Princess Margaret in Netflix hit 'The Crown'.
Olivia Colman and Helena Bonham Carter in The Crown: New Photos
According to reports, the Brit star is being lined up as the villain in Bond 25, the forthcoming movie in the 007 series.