The Duke and Duchess of Cambridge have released a number of photos to mark Prince Louis' christening on Monday 9 July.
He used exclusive interview aboard Air Force One to talk up his credentials as a peace maker, and express his liking of the Royal Family.
Tom Hiddleston and Hugh Grant were also among the celebrity guests.
It was an outing for the sisters-in-law without their princely partners.
Donald Trump becomes the twelfth US president she has met.
The Queen is due to meet Donald and Melania Trump for tea at Windsor Castle.
The head of state will greet the American leader and the First Lady at her Berkshire royal residence.
The prince was visiting the restored Temperate House at Kew Gardens in London.
As Donald Trump prepares to meet the Queen on Friday, ITV News spoke to a former royal butler to get a few handy tips for the US President.
The Duke of Cambridge went on the official Kensington Palace Twitter account to speak of his pride in the team.