King Charles III will say the UK and France must stand together in the face of a "multitude of complex threats", when he speaks at a state banquet for French President Emmanuel Macron, BBC reported.

Macron and his wife Brigitte will be welcomed by the King and Queen and the Prince and Princess of Wales, as they arrive for a three-day state visit.

The state banquet will be a highlight of the trip, with famous faces, a showcase menu and a message from the King about the "shared history and culture between our two peoples".

This is the first state visit by the leader of an EU country since Brexit and the King will emphasise the need to work together on issues from military threats to climate change, according to BBC.