Actress Haydn Gwynne, known for her role in The Crown, has died at the age of 66.

Gwynne's passing follows a recent cancer diagnosis, according to a statement from her representatives that has been published by Sky News.

"It is with great sadness we are sharing with you that, following her recent diagnosis with cancer, the star of stage and screen Haydn Gwynne died in hospital in the small hours of Friday, October 20, surrounded by her beloved sons, close family and friends," the statement reads.

It continues, "We would like to thank the staff and teams at the Royal Marsden and Brompton Hospitals for their wonderful care over the last few weeks."

Details about Gwynne's cancer have not been reported.

Fox News reports, "Prior to rising to fame, Hadyn taught English in Italy. Her breakout role came in the '90s on the sitcom Drop the Dead Donkey."

Chances are, though, that you are more familiar with the roles that Gwynne played more recently.

"She was Queen Camilla in TV royal spoof The Windsors, and played ex-PM Margaret Thatcher on stage in The Audience," BBC News reports.

The outlet goes on to report that Gwynne "portrayed Lady Susan Hussey, who resigned from the royal household following a racism row, in the fifth series of Netflix's The Crown."

Gwynne, according to The BBC, also played the role of "Dr. Joanna Graham in Peak Practice, Supt Susan Blake in Merseybeat, and Julius Caesar's wife Calpurnia in the BBC's Rome."

For her various acting roles, Gwynne was nominated for numerous awards, including a Tony Award for her role in the musical Billy Elliot. It is unclear, however, whether she received any of these awards.

Gwynne, according to reports, was about to appear in a musical tribute called Stephen Sondheim's Old Friends. But, she ended up withdrawing in last month due to "sudden personal circumstances."

Gwynne's peers in the acting world have taken to social media to pay tribute to the late actress. Among them is actress Helen Mirren, who wrote:

Haydn was a delight as a person and a consummate dedicated actress. I had the huge pleasure of sharing the stage with her, in the play The Audience where, much like the original characters, (Queen Elizabeth II and Margaret Thatcher) we danced a delicate dance together. She was both funny and serious at the same time, a brilliant balancing act that her whole career exemplified. We will miss her very much.

Gwynne is survived by her partner, Jason Phipps, and their two sons.