Prince Louis has been christened!
Louis was baptised by the Archbishop of Canterbury, the Most Reverend Justin Welby in a 40-minute service which started at 4 pm, and was attended by royals including William's brother Prince Harry and his new wife Meghan, Duchess of Sussex.
The 11-week-old is set to get baptized at the Chapel Royal in St James's Palace and Kensington Palace have now confirmed that Nicholas van Cutsem, Guy Pelly, Harry Aubrey-Fletcher, Lady Laura Meade, Mrs. Robert Carter and Lucy Middleton will all be godparents.
The monarch was due to return to London on Monday before a busy schedule of events including a meeting with US President Donald Trump on Friday at her Windsor Castle home.
The 3-year-old royal had a message for photographers outside of her younger brother Prince Louis's royal christening in London on Monday.
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Kate's parents and siblings were also there, including her sister Pippa Middleton, who is pregnant.
Princess Charlotte, three, left her brother Prince George, four, in stitches as she was seen squishing her nose against the window before making a series of hilarious faces towards the crowds.
Earlier today, the Duchess of Sussex and Duchess of Cambridge attended a special service at Westminster Abbey to mark 100 years of the Royal Air Force.
Duke and Duchess of Cambridge with Prince George, Princess Charlotte and Prince Louis. However, she did break out of the box by wearing an exaggerated knit headband, which was tucked into her low bun.
Markle wore a hat by Stephen Jones and suede Manolo Blahnik stilettos, both within the same colour tones as her Ralph Lauren dress.