The christening photos are the first without the Queen, who missed her great-grandson's baptism, which took place in a private ceremony.
They are joined by the Duke and Duchess of Sussex, the Prince of Wales and the Duchess of Cornwall, and the Middleton family including Kate's parents, Carole and Michael Middleton, Kate's sister Pippa Matthews and her husband James and the youngest of the Middleton family, James.
"The photographs were taken by Matt Holyoak at Clarence House, following Prince Louis's christening".
Speaking after the official shoot, Mr Holyoak said: "I was truly honoured at being asked to take the official photographs at the christening of Prince Louis, and to witness at first hand such a happy event".
A third photograph features just the Cambridge family as a family of five, as Kate gazes down into the eyes of the newest member of the Cambridge family.
After the ceremony, the baby prince looked content and adorable as he wiggled his fingers at his smiling mum.
The Duke and Duchess of Cambridge with Prince George, Princess Charlotte and Prince Louis.
The following day the Queen, alongside other members of the royal family, attended the RAF centenary in London.
Louis was christened in the Chapel Royal at St James's Palace on 9 July with the Royal Family, Middleton family and his godparents and their spouses in attendance.
It is a replica of the royal christening robe, first worn in 1841.
The Prince's godparents were also announced the morning of his christening as Nicholas van Cutsem, Guy Pelly, Harry Aubrey-Fletcher, Lady Laura Meade, Robert Carter and Lucy Middleton.
And "The Duke and Duchess of Cambridge, Prince George, Princess Charlotte and Prince Louis, following Prince Louis's christening".