A crew member noticed her sneaky move but gave Colman a kind nod of approval.
“It was a lovely props person who said, ‘I’m not allowed to do this, but take that,’” Colman claimed.
The Oscar-winning actress has also spoken out about the late Queen Elizabeth who died in September last year, aged 96.
Of Her Majesty’s dedication to her role, Colman told Variety, “I wouldn’t know where to begin with that.
“She made a promise as a young woman, and she absolutely kept it with such dignity. We’re all incredibly impressed by what she did.”
The Crown has been a successful yet contentious series for Netflix with depictions of members of the royal family and their lives creating equal parts animosity and intrigue.
Season 5 premiered in November and filming for season 6, which will portray the death of Diana, Princess of Wales, is under way.