Kate, as Prince William’s wife is commonly known, has been gradually returning to public duties since last fall, when she announced that she had completed chemotherapy and would return to work. At the time, she said her road to full recovery would be long and she would “take each day as it comes.”

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 question 'Is Kate Middleton okay?' surged on social media Wednesday afternoon after the Princess of Wales abruptly withdrew from her scheduled appearance at Royal Ascot, one of the most anticipated events in the British social calendar.