Kate Middleton has returned to her public duties

Catherine, Princess of Wales, has made a triumphant return to her public royal duties amid her preventative cancer treatment.

Kate, 42, who announced her battle with the disease in March after months of speculation about her whereabouts and well-being, has largely stayed out of the spotlight since the announcement, but on August 25 she joined the royal family to celebrate the official King Charles' birthday.

She was pictured beaming as she waved to fans alongside her three children - Prince George, 11, Princess Charlotte, 9, and Prince Louis, 6 - who were greeted by crowds on The Mall, London, after leaving Buckingham Palace in procession with a carriage for a flower-laying ceremony.

There were doubts that she would appear at the ceremony, as she missed the rehearsal for the celebration last week.

Confirmation that she was present was only given at 6 pm on 24 August.

King Charles also suffers from an undisclosed form of cancer, which was discovered after he underwent routine surgery to remove an enlarged prostate.

Catherine was surrounded by other members of the royal family on August 25, including her husband Prince William, as well as Princess Anne, a colonel in the Blues and Royals, and Prince Edward, a colonel in the Scots Guards.

Charles rides in a carriage with Queen Camilla. He inspected the officers and guardsmen at the Horse Guards Parade in Whitehall from a carriage instead of on horseback.

In another change, Catherine did not join senior family members on the podium but watched the spectacle with her children from the Duke of Wellington's former office.

The military event, also known as the Birthday Parade, is a gift from the Home Division, which Charles first attended in 1951 when he was three years old.

"Over the past few months, I have been overwhelmed by all the kind messages of support and encouragement. It really means a lot to me and William and has helped us through some of the toughest times. I'm making good progress, but as anyone going through chemo knows, there are good days and bad days. On these bad days, you feel weak, and tired and you need to give your body a break. But on the good days, when you feel stronger, you want to make the most of feeling good," Kate stated. | BGNES