Prince Philip used to be a very heavy smoker which Queen Elizabeth II hated due to her father's heath issues. She gave the prince an ultimatum to quit.
Meghan Markle was not the first person Prince Harry spoke to after his sumit with Queen Elizabeth at Sandringham concerned his exit from the royal family.
When casting 'The Crown', creator Peter Morgan felt so strongly about one actor signing on the for a specific part he felt there'd be no show without them.