The Most Adorable Photos of Birthday Boy Prince Louis

The youngest child of Prince William and Kate Middleton could not be any cuter! See the young prince grow up through these sweet throwback photos

01 of 09

Sleeping Prince

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

Kate Middleton cuddles a sleeping baby Louis as they arrive for his christening service at the Chapel Royal, situated within the grounds of St. James's Palace, in July 2018, three months after his April 23 birthdate.

02 of 09

Baby Brother

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

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

03 of 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.
Max Mumby/Indigo/Getty

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.

04 of 09

Feeling All the Feels

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

After gazing from the window, the royal siblings join parents Prince Charles and Kate Middleton to wave to the crowds in person. (From the looks of it, Louis may have wanted to go back inside!)

05 of 09

Smiling Spectators

Prince Louis
Max Mumby/Indigo/Getty

Mom Kate Middleton and Prince Louis watch a flypast from the balcony of Buckingham Palace during Trooping the Colour, and little Louis gives a little wave.

06 of 09

Big Applause

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

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.

07 of 09

Keeping Close to Mom

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 Louis of 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.

08 of 09

Happy Christmas!

Duke and Duchess of Cambridge - Royal Christmas cards 2020
The Cambridge family's 2020 Christmas card. Matt Porteous / The Duke and Duchess of Cambridge/Kensington Palace via Getty

The youngest royal is front and center for the family's 2020 Christmas card, shot at Anmer Hall in Norfolk, England by Matt Porteous.

09 of 09

Playful Prince!

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 Louis. KENSINGTON PALACE/AFP via Getty Images

Prince Louis frolicks on the beach near his family's home in Norfolk in a series of new photos in celebration of his 4th birthday on April 23.

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