Catherine, Princess of Wales, joined other members of Britain’s royal family at a Remembrance Day event in London on Saturday – the latest public appearance by the princess since she underwent preventive treatment for cancer earlier this year.

Catherine, also known as Kate, was shown in a photograph attending the Festival of Remembrance at the Royal Albert Hall, along with King Charles and her husband, Prince William.

The festival is an annual commemorative concert which honors all those who have lost their lives in conflict.

Queen Camilla was originally set to attend but pulled out due to a chest infection, Buckingham Palace said on Saturday.

Kate, 42, announced that she had completed chemotherapy in September but cautioned that the road to recovery was still long. She said she would undertake more public engagements when possible as she continues to recover.

In October, she made her first public appearance since her cancer treatment to meet the bereaved families of three children killed in a knife attack in Southport, northwest England.

Kate is also set to attend a Remembrance Day service on Sunday, Buckingham Palace said.