Princess Charlotte, the only daughter of Britain's Prince William and his wife Catherine, Princess of Wales, is celebrating her ninth birthday on May 2.

Her cousin Prince Archie, the only son of Prince Harry and his wife Meghan, Duchess of Sussex, will turn five years old on May 6.

Here's a closer look at the young children in the royal family.

The Prince and Princess of Wales have released a photo of Princess Charlotte to mark her ninth birthday on Thursday, May 2.
The Prince and Princess of Wales have released a photo of Princess Charlotte to mark her ninth birthday on Thursday, May 2.
The Princess of Wales
Prince George, the eldest son of William and Kate, attends a Christmas Day church service in 2019. George is second in line to the British throne, behind his father.
Prince George, the eldest son of William and Kate, attends a Christmas Day church service in 2019. George is second in line to the British throne, behind his father.
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US President Barack Obama talks to Prince George while visiting Kensington Palace in 2016.
US President Barack Obama talks to Prince George while visiting Kensington Palace in 2016.
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Prince George was born in London on July 22, 2013. He is the first of William and Kate's three children.
Prince George was born in London on July 22, 2013. He is the first of William and Kate's three children.
Carl Court/AFP/Getty Images
Princess Charlotte, William and Catherine's middle child, is seen in this handout photo released on May 1, 2021, a day before her sixth birthday. She's third in line to the British throne, behind her brother Prince George.
Princess Charlotte, William and Catherine's middle child, is seen in this handout photo released on May 1, 2021, a day before her sixth birthday. She's third in line to the British throne, behind her brother Prince George.
The Duchess of Cambridge via Getty Images
Princess Charlotte playfully sticks out her tongue while attending a King's Cup regatta with her mother in 2019.
Princess Charlotte playfully sticks out her tongue while attending a King's Cup regatta with her mother in 2019.
Chris Jackson/Getty Images
Kate holds newborn Princess Charlotte while speaking to the media outside a London hospital in 2015.
Kate holds newborn Princess Charlotte while speaking to the media outside a London hospital in 2015.
Ben Stansall/AFP/Getty Images
This photo of Prince Louis, taken by his mother Kate, was released on April 23, 2024 to celebrate his 6th birthday. Louis is fourth in line to the throne.
This photo of Prince Louis, taken by his mother Kate, was released on April 23, 2024 to celebrate his 6th birthday. Louis is fourth in line to the throne.
The Princess of Wales/Kensington Palace/AP
Prince Louis, William and Kate's youngest son, rides his bicycle before leaving for his first day of nursery school in April 2021.
Prince Louis, William and Kate's youngest son, rides his bicycle before leaving for his first day of nursery school in April 2021.
The Duchess of Cambridge/Kensington Palace/Getty Images
William and Catherine leave the hospital with Prince Louis after his birth in 2018.
William and Catherine leave the hospital with Prince Louis after his birth in 2018.
Chris Jackson/Getty Images
Prince Harry and his wife Meghan, Duchess of Sussex, visit South Africa with their son, Prince Archie, in 2019. Archie is sixth in line to the throne, just behind his father.
Prince Harry and his wife Meghan, Duchess of Sussex, visit South Africa with their son, Prince Archie, in 2019. Archie is sixth in line to the throne, just behind his father.
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Prince Archie of Sussex was born in May 2019.
Prince Archie of Sussex was born in May 2019.
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Princess Eugenie and her husband, Jack Brooksbank, hold their newborn son, August, in February 2021. August is 12th in line to the throne, behind his mother, his aunt Princess Beatrice and her daughter, Sienna, and his grandfather, Prince Andrew.
Princess Eugenie and her husband, Jack Brooksbank, hold their newborn son, August, in February 2021. August is 12th in line to the throne, behind his mother, his aunt Princess Beatrice and her daughter, Sienna, and his grandfather, Prince Andrew.
Princess Eugenie and Jack Brooksbank/Getty Images
The Queen's son Prince Edward poses with his son, James, Earl of Wessex, in September 2020. Prince Edward and his wife Sophie, Duchess of Edinburgh, have two children: James and Lady Louise Mountbatten-Windsor.
The Queen's son Prince Edward poses with his son, James, Earl of Wessex, in September 2020. Prince Edward and his wife Sophie, Duchess of Edinburgh, have two children: James and Lady Louise Mountbatten-Windsor.
Samir Hussein/WireImage/Getty Images
Louise is currently 16th in line to the throne.
Louise is currently 16th in line to the throne.
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Cousins Mia Tindall, left, and Savannah Phillips attend the wedding of Princess Eugenie in 2018. Mia and Savannah are two grandchildren of the Queen's only daughter, Princess Anne. Mia is one of three children born to Mike and Zara Tindall. Savannah is one of two children born to Peter and Autumn Phillips.
Cousins Mia Tindall, left, and Savannah Phillips attend the wedding of Princess Eugenie in 2018. Mia and Savannah are two grandchildren of the Queen's only daughter, Princess Anne. Mia is one of three children born to Mike and Zara Tindall. Savannah is one of two children born to Peter and Autumn Phillips.
Max Mumby/Indigo/Getty Images
Isla Phillips, Savannah's sister, plays on an inflatable slide during a festival in 2018.
Isla Phillips, Savannah's sister, plays on an inflatable slide during a festival in 2018.
Max Mumby/Indigo/Getty Images
Mia Tindall attends the Gatcombe Horse Trials in March 2019.
Mia Tindall attends the Gatcombe Horse Trials in March 2019.
Max Mumby/Indigo/Getty Images
Zara Tindall's younger daughter, Lena, is seen in 2019. Zara gave birth to another child, Lucas, in March 2021.
Zara Tindall's younger daughter, Lena, is seen in 2019. Zara gave birth to another child, Lucas, in March 2021.
Steve Parsons/Press Association/AP