Camilla met author Peter James, centre, and actor John Simm while Grace was being filmed in 2021 (Gareth Fuller/PA) The Queen is to star in a new crime novel alongside her favourite fictional ...

The Queen is understood to have been aware of the book. Queen Camilla meets actor John Simm and cast members during her visit to the set of ITV’s adaptation of The Roy Grace series. Picture: Alamy ...

In 2021, she visited the set of Grace – ITV’s television adaptation of James’s books which stars John Simm as the troubled but methodical detective – and joked about asking for a cameo role.

In 2021, Camilla visited the set of 'Grace', an ITV adaptation of the novels starring John Simm as the detective and it was her conversation with the author that sparked the seed for his new book.