The royal engagement was announced in November by Clarence House - the couple later appeared to make a statement to the press.
It was then revealed that Markle would be leaving her role as Rachel Zane in the US drama Suits, with it strongly suspected that she would depart with her on-screen fiance Patrick J. Adams at the end of the current season.
It was noted that during his role he was able to make some sense of the complex life of a man who lived reluctantly in the Queen's shadow for part of their marriage.
"I feel sorry for her," he said, making his co-star Claire Foy laugh. "It's such a huge transition in her life, and it's such a huge thing to take on. Life as she knows it is gone. But hey, she's marrying the prince of Britain - it's quite exciting for her."
"You realised... the fact that Elizabeth forbade her sister from marrying a divorced man - it just shows how time has changed, and how they've had to evolve," Foy added.
"This would not have happened 50 or 60 years ago, and I think that's why the monarchy will survive and hopefully thrive, is because it's willing to change and listen to the people and realise that some elements of the institution are just outdated."
The Crown returns to Netflix on 8 December - read our review here.