Kate, who shares three young children with William, has made a gradual return to public engagements this year since announcing in January that she is in remission from cancer. Kate has not shared details of the type of cancer with which she was diagnosed, though she has shared she underwent chemotherapy treatment.

Kate Middleton, the Princess of Wales, recently appeared alongside Prince William, as well as their children Prince George, Princess Charlotte and Prince Louis at Trooping the Colour.

The princess canceled plans to attend the horse racing event on Wednesday as she tries to find the “right balance” in her recovery from cancer, Kensington Palace said.