The Queen met women leaders from across the Commonwealth at an event in London dedicated to tackling domestic violence.
Camilla said it was “so important” for her to attend the event on Wednesday evening at Marlborough House, which focused on protecting women and children from domestic violence.
Commonwealth Secretary General Baroness Scotland greeted Camilla as she arrived at Commonwealth headquarters in central London.
Baroness Scotland said one in three women in the world will be affected by domestic violence at some stage in her life, adding that women were “disproportionately affected” in any form of crisis.
He said Camilla's support was “wonderful”, adding that the Queen had “great care for people”.
Baroness Scotland, the first woman to serve as attorney general for England and Wales, told the PA news agency: “So many people would like to be silent and it's not necessarily a comfortable thing to talk about.
“But Her Majesty was absolutely adamant that she would be a representative for all those women who feel they don't have a voice.”
Camilla, dressed in a forest green blazer, attended a reception of dignitaries, which included British-Ghanaian businesswoman and actress Lady Dentaa Amoateng.
He also met leaders of the Mirabel Centre, Nigeria's first referral center to provide free medical and psychosocial support to survivors of rape and sexual assault.
Itoro Eze-Anaba, the centre's founder, said Camilla's support “helped people talk” as it brought “credibility” to the centre.
He added that the center had helped more than 8,200 survivors of rape and sexual assault – with the youngest of the centre's clients just three months old and the oldest 82 years old.
Ayotola Jagun, manager at the Mirabel Centre, said having Camilla's support as patron had “done wonders” for the confidence of staff at the centre.
Camilla also met Maya Kirti Nanan, the winner of the 2023 Commonwealth New Person of the Year award.
The 20-year-old from Trinidad and Tobago founded an autism center called Rahul's Clubhouse, named after her brother Rahul who was diagnosed with autism.
The Commonwealth Secretariat said the event at Marlborough House would help build an alliance “engaging across sectors and professions” to work to protect women and children from domestic violence.
He added that it would also help inform the Commonwealth's strategy at Cop28 to “advocate for the needs and interests of women and girls, including calling for a comprehensive damage and loss fund”.