Catherine, Princess of Wales, was not at Royal Ascot on Wednesday, with a royal source citing her need for balance as she returns to public engagements after being treated for cancer last year.

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.

Kate Middleton withdrew from attending Royal Ascot, one of the largest events in the British social calendar, with palace officials saying she was attempting to find the "right balance" as she recovers from cancer.