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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 visiting the UK on a three-day state.
King Charles III and Queen Camilla are hosting the Macrons in Windsor, where crowds have cheered a carriage procession and there have been other displays of pageantry.
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 stop small boats crossing the Channel.
Below are some of the best pictures from the first day of the visit.
You can also follow events live here.
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President Macron (left) and his wife Brigitte (centre right) were welcomed by the Prince and Princess of Wales after flying to RAF Northolt in London
Reuters
In Windsor, the French presidential couple were later greeted by the King and Queen
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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
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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
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Well-wishers in Windsor greeted the French presidential couple by waving tricolour flags
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UK and French flags have been flying around Windsor for the occasion
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The two couples viewed items on display at the Royal Collection exhibition at Windsor Castle
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The items included a copy of Comedies, histories and tragedies, London 1632, by William Shakespeare