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Sleeping Prince

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Catherine Duchess of Cambridge carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James’s Palace. The Christening of Prince Louis, London, UK - 09 Jul 2018

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Prince Louis and Princess Charlotte.HRH Duchess of Cambridge via Getty

Princess Charlotte and Prince Louis

Newborn Louis gets a kiss from big sister Charlotte on her 3rd birthday at Kensington Palace in London in May 2018.

03of 09

Sucker for You

Prince George of Cambridge, Prince Louis of Cambridge (sucking his thumb) and Princess Charlotte of Cambridge look out of a window of Buckingham Palace as they attend Trooping The Colour, the Queen’s annual birthday parade, on June 8, 2019 in London, England. The annual ceremony involving over 1400 guardsmen and cavalry, is believed to have first been performed during the reign of King Charles II. The parade marks the official birthday of the Sovereign, although the Queen’s actual birthday is on April 21st.

Siblings George, Louis (adorably sucking his thumb) and Charlotte watch from the window during Trooping the Colour, the Queen’s annual birthday parade, in June 2019.

04of 09Feeling All the FeelsPrince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Samir Hussein/WireImageAfter gazing from the window, the royal siblings join parentsPrince CharlesandKate Middletonto wave to the crowds in person. (From the looks of it, Louis may have wanted to go back inside!)

04of 09

Feeling All the Feels

Prince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Samir Hussein/WireImage

Princess Charlotte

After gazing from the window, the royal siblings join parentsPrince CharlesandKate Middletonto wave to the crowds in person. (From the looks of it, Louis may have wanted to go back inside!)

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Smiling Spectators

Prince Louis

MomKate MiddletonandPrince Louiswatch a flypast from the balcony of Buckingham Palace during Trooping the Colour, and little Louis gives a little wave.

06of 09Big ApplauseComic Relief/BBC Children in Need/Comic Relief via GettyThe royal family applauds NHS carers, as part of the BBC Children in Need and Comic Relief special, in London in April 2020 during the early days of the COVID-19 pandemic. Little Louis gives his best teeny claps, as his mom holds him in her arms.

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Big Applause

Comic Relief/BBC Children in Need/Comic Relief via Getty

Prince Louis

The royal family applauds NHS carers, as part of the BBC Children in Need and Comic Relief special, in London in April 2020 during the early days of the COVID-19 pandemic. Little Louis gives his best teeny claps, as his mom holds him in her arms.

07of 09Keeping Close to MomAARON CHOWN/POOL/AFP via GettyPrince Louisof Cambridge holds his mom’s hand as they attend a special pantomime performance of The National Lottery’s Pantoland at London’s Palladium Theatre in December 2020.

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Keeping Close to Mom

AARON CHOWN/POOL/AFP via Getty

Britain’s Prince Louis of Cambridge holds his mother’s hand as they attend a special pantomime performance of The National Lotterys Pantoland at London’s Palladium Theatre in London on December 11, 2020, to thank key workers and their families for their efforts throughout the pandemic.

Prince Louisof Cambridge holds his mom’s hand as they attend a special pantomime performance of The National Lottery’s Pantoland at London’s Palladium Theatre in December 2020.

08of 09

Happy Christmas!

The Cambridge family’s 2020 Christmas card.Matt Porteous / The Duke and Duchess of Cambridge/Kensington Palace via Getty

Duke and Duchess of Cambridge - Royal Christmas cards 2020

09of 09Playful Prince!Prince Louis.KENSINGTON PALACE/AFP via Getty ImagesPrince Louisfrolicks on the beach near his family’s home in Norfolk in aseries of new photosin celebration of his 4th birthday on April 23.

09of 09

Playful Prince!

Prince Louis.KENSINGTON PALACE/AFP via Getty Images

Prince Louis of Cambridge posing for a photograph, taken by his mother, Britain’s Catherine, Duchess of Cambridge, in Norfolk, eastern England 4th Birthday Portraits

Prince Louisfrolicks on the beach near his family’s home in Norfolk in aseries of new photosin celebration of his 4th birthday on April 23.

source: people.com