It was previously revealed that Imelda Staunton (A Confession) will take over from Olivia Colman (Broadchurch) as Queen Elizabeth. Princess Margaret will be portrayed by Lesley Manville in the final season. It will take a while before these actors can be seen in their new roles, as production for the fifth season is set to begin June 2021, after the fourth season has released.
Jonathan Pryce will play Prince Philip in the final two seasons of The Crown (Seasons 5 and 6), alongside Imelda Staunton and Lesley Manville. pic.twitter.com/zI7NotOfc4
— The Crown (x-on:TheCrownNetflix) August 13, 2020
Elizabeth Debicki will play Princess Diana in the final two seasons of The Crown (Seasons 5 and 6). pic.twitter.com/Z3CjHuJ56B
— The Crown (x-on:TheCrownNetflix) August 16, 2020