Her Majesty, a long-term campaigner on the issue of violence against women, invited Mme Pelicot for tea at Clarence House to discuss a new memoir she has written about her shocking case.
In his historic statement yesterday the King vowed he and his family would 'continue in our duty and service to you all' while the legal process runs its course.
Charles and Camilla greeted royal fans at separate events this afternoon - with the King attending London Fashion Week while his wife appeared in Westminster.
Queen Camilla was seen smiling for the cameras with veteran fashion editor Anna Wintour just hours after her brother-in-law, Andrew Mountbatten, was arrested.
King Charles is set appear at London Fashion Week just hours after his brother Andrew Mountbatten-Windsor was arrested on his 66th birthday this morning.
The Queen, 78, paid a visit to the city's historic Theatre Royal where she watched part of the technical rehearsal for the community production of David Copperfield.
In a statement, it was announced that the pair's 'largely private' civil ceremony was set for April 8 at Windsor Guildhall, while Charles publicly declared how 'delighted' he was to re-marry.