Photos: Happy 1st birthday, Prince Louis!

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Photos: Happy 1st birthday, Prince Louis!

Prince Louis, the youngest child of Britain's Prince William and Duchess Kate, celebrated his first birthday on April 23, 2019. Here are some memorable moments from his first year.

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

LONDON, ENGLAND - APRIL 23: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their new born son Prince Louis of Cambridge at St Mary's Hospital on April 23, 2018 in London, England. The Duchess safely delivered a boy at 11:01 am, weighing 8lbs 7oz, who will be fifth in line to the throne. (Photo by Dan Kitwood/Getty Images)

LONDON, ENGLAND - APRIL 23: The newborn son Prince Louis of Cambridge of Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge, departs the Lindo Wing at St Mary's Hospital on April 23, 2018 in London, England. The Duchess safely delivered a boy at 11:01 am, weighing 8lbs 7oz, who will be fifth in line to the throne. (Photo by Gareth Cattermole/Gareth Cattermole/Getty Images)

LONDON, ENGLAND - APRIL 23: Catherine, Duchess of Cambridge departs the Lindo Wing with her new born son Prince Louis of Cambridge at St Mary's Hospital on April 23, 2018 in London, England. The Duchess safely delivered a boy at 11:01 am, weighing 8lbs 7oz, who will be fifth in line to the throne. (Photo by John Stillwell - WPA Pool/Getty Images)

LONDON, ENGLAND - APRIL 23: Catherine, Duchess of Cambridge departs the Lindo Wing with her newborn son Prince Louis of Cambridge at St Mary's Hospital on April 23, 2018 in London, England. The Duchess safely delivered a boy at 11:01 am, weighing 8lbs 7oz, who will be fifth in line to the throne. (Photo by John Stillwell - WPA Pool/Getty Images)

FILE - In this Monday, July 9, 2018 file photo, Kate, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London. The youngest child of Prince William and his wife Kate is about to celebrate his first birthday. Prince Louis will mark the milestone Tuesday, April 23, 2019. (Dominic Lipinski/Pool Photo via AP, file)

LONDON, ENGLAND - JULY 09: Catherine, Duchess of Cambridge carries Prince Louis Of Cambridge as they arrive for his christening service at St James's Palace on July 09, 2018 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)

LONDON, ENGLAND - JULY 09: Catherine, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at St James's Palace on July 09, 2018 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)

LONDON, ENGLAND - JULY 09: Catherine, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at St James's Palace on July 09, 2018 in London, England. (Photo by Dominic Lipinski - WPA Pool/Getty Images)

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

This Monday, July 9, 2018, photo provided by the Duke and Duchess of Cambridge shows the official photograph to mark the christening of Prince Louis at Clarence House, following Prince Louis' baptism, in London. Seated, left to right: Prince George, Prince William, the Duke of Cambridge; Prince Louis; Kate, the Duchess of Cambridge; and Princess Charlotte. Standing, left to right: Prince Harry, The Duke of Sussex; Megan, the Duchess of Sussex; Camilla, the Duchess of Cornwall; Prince Charles, Prince of Wales; Carole Middleton, Michael Middleton, Pippa Matthews, James Matthews and James Middleton. (Matt Holyoak/Camera Press/Duke and Duchess of Cambridge via AP)

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This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

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