"Not only are we casting real-life characters but as we get closer to the present day, many of these people are very much alive," The Crown casting director Nina Gold told Vanity Fair of selecting new stars. "So we have to honour them by picking the right actor".
Charles and Anne will be portrayed by more adult actors, taking centre stage form child stars Billy Jenkins and Julian Baring, and Lyla Barrett-Rye as the only princess of the new generation. In this era the pair graduated from school and embarked on first loves, including Charles's romance with Camilla and Anne's with Camilla's future husband Andrew Parker Bowles.
It's the big question: when will the People's Princess appear in The Crown? It has been suggested Diana will appear towards the end of season 3, before becoming a major part of the show in season 4.
Camilla Parker Bowles
Meanwhile, Prince Charles's current wife will be introduced in season 3.
The Prime Ministers
We've seen Elizabeth tame her fair share of PMS, and season 3 will be no different. The Queen will go toe-to-toe with Harold Wilson, who served from 1964-1970 and 1974-76. And that's before Margaret Thatcher comes to power in 1979. She'll most likely make her Iron Lady presence felt in season 4.
With the principal cast being replaces for seasons 3 and 4, meet the fresh faces earmarked to play HM and HRH.
After transforming Elizabeth from nervous royal to confident Queen, Claire Foy farewells The Crown. Taking her place is Olivia Colman, who viewers will recognise from Broadchurch.
Vanessa Kirby stole the show as Margaret and reports Helena Bonham Carter is stepping into the princess's kitten heels were seemingly sanctioned by a January post by Kirby of the duo captioned, "Honoured."
"Say hello to your new Prince Philip...Tobias Menzies!" announced Netflix on March 29. The actor who had a tough gig on Outlander, takes over from Matt Smith as the Duke if Edinburgh.
You can binge The Crown on Netflix now.