Kate Middleton, Princess of Wales, has returned to work in Windsor.

According to reports, she is expecting her fourth child.

The good news has been communicated to King Charles by Prince William and Kate.

The pregnancy was also known to the late Queen Elizabeth.

After spending time with her family, Kate has returned to royal duties.

On October 15, she completed her final royal duty.

At Windsor Castle, she met with the Chief Executive of the Royal Foundation.

Kate and Prince William are the parents of three children: Prince George, Princess Charlotte, and Prince Louis.

Kate is a patron of the Prince and Princess of Wales' Royal Foundation.