Dominic, best known for his role in The Wire, is set to portray the then Prince in seasons five and six of the Netflix historical drama.
The 53-year-old star also has a personal connection with the British royal family as an ambassador for The Prince’s Trust, a youth charity the King founded in 1976.
When he was offered the chance to play Charles on-screen, Dominic sent him a private letter expressing his desire to resign from the trust because he was concerned about the conflict of interest.
However, the actor ended up receiving a surprising response from Charles through his press secretary, who rejected his resignation and said: “You do what you like, you’re an actor, it’s nothing to do with us.”
“I think that’s probably how [Charles] regards it,” he added in an interview with Radio Times. “I’ve been in line to shake his hand a few times –and it’s fascinating. It’s very useful to meet the character you’re playing.”
Season five of The Crown will drop on Netflix on November 9 and showcase the events of 1992, which was referred to by the Queen as the royal family's ‘annus horribilis’ or horrible year.
Within one year, Windsor Castle caught fire and suffered extensive damage, as well as the divorces of Prince Charles and Princess Diana, Prince Andrew and Sarah Ferguson AKA Fergie, and Princess Anne and Captain Mark Phillips.
It also saw the release of Andrew Morton's tell-all book Diana: Her True Story, which was written with the princess' help.
The one moment that will never be shown
Dominic’s comments come shortly after Netflix revealed the one moment that will never be shown in the series - Princess Diana’s car crash.
“The exact moment of the crash impact will not be shown,” Netflix shared with The Sun.
It comes after a source revealed to Deadline that the sixth season will portray before and after the crash.
“It's the run-up: the car leaving The Ritz after midnight with paparazzi in pursuit and then the aftermath with the British Ambassador to France swinging into action with the Foreign Office and then the subsequent constitutional aftermath,” they claimed.
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