King Charles III and President Emmanuel Macron were seen chatting during a carriage procession to Windsor Castle
The French President Emmanuel Macron and his wife Brigitte are in the UK for a three-day state visit.
King Charles III and Queen Camilla hosted the Macrons in Windsor, where crowds cheered a carriage procession.
The French couple were earlier greeted by Prince William and Catherine as they touched down at RAF Northolt.
Later, the president will address Parliament and meet UK Prime Minister Sir Keir Starmer, with the pair expected to discuss how to tackle the issue of small boats crossing the Channel.
Below are some of the best pictures from the first day of the visit.
Emmanuel and Brigitte Macron are greeted by Prince William and Catherine on the tarmac at RAF Northolt
Reuters
In Windsor, the French presidential couple were later greeted by the King and Queen
WPA Pool/Getty Images
The Queen (right) and Brigitte Macron were riding in a separate carriage to their partners
Reuters
The King and Queen and their guests then reviewed the Guard of Honour at the historic grounds of Windsor Castle
Reuters
President Macron and King Charles then personally inspected the guardsmen
Anadolu via Getty Images
Princess of Wales Catherine and Prince of Wales William also took part in the welcoming procession in Windsor Castle
Reuters
Preparations were in full swing since early morning in Windsor, where the main events are taking place on day one of the state visit
AFP via Getty Images
Well-wishers in Windsor greeted the French presidential couple by waving tricolour flags
Reuters
UK and French flags have been flying around Windsor for the occasion
PA Media
The two couples viewed items on display at the Royal Collection exhibition at Windsor Castle
PA Media
The items included a copy of Comedies, histories and tragedies, London 1632, by William Shakespeare
PA Media
In the afternoon, the Macrons took a tour of Westminster Abbey, where the French president placed a wreath at the tomb of the Unknown Warrior.
Reuters
Macron delivered a wide-ranging speech to MPs in Parliament, in which he said that the UK and France have a duty to tackle illegal migration and addressed the wars in Ukraine and Gaza
Reuters
The French president and his wife then joined Sir Keir Starmer and his wife Victoria to lay a wreath at the statues of Sir Winston Churchill and former French President Charles de Gaulle (pictured).