Princess Kate joined her husband Prince William, King Charles III and Queen Camilla on Tuesday as they kicked off France's state visit to the U.K. The royals gathered at RAF Northolt in Windsor, England, to welcome French President Emmanuel Macron and his wife Brigitte at the start of their three-day state visit.

Kate Middleton and Prince William helped start the France state visit to the U.K. by welcoming President Emmanuel Macron and his wife, Brigitte Macron, before meeting up with King Charles and Queen Camilla.

When France’s President Emmanuel Macron greeted Kate Middleton on July 8, he politely kissed her on the hand. While gentlemanly, was this a break in royal protocol? In short, no—although the gesture is a rare one for the Princess of Wales to experience when meeting diplomats.