“Not that my opinion matters!” Stewart, who will portray the Princess of Wales in the upcoming film "Spencer," said.
Elizabeth Debicki and Dominic West are taking over the roles for the fifth season of the hit royal drama.
The actor, who plays Princess Diana on Netflix's "The Crown," said they've "still got a way to go" when it comes to publicly embracing themselves as queer.
"It's all a journey ... Lots of twists and turns and change and that's ok! Embrace it," British actor wrote on Instagram.
The new star on the Netflix series described one scene in a "freezing-cold swimming pool" in Spain that was the "hardest" to film.