01of 12King George VIKing George VI.Hulton-Deutsch Collection/CORBIS/Corbis via GettyBorn December 14, 1885,Queen ElizabethII’s father, King George VI, turned 40 in 1935, taking the throne the following year after his brother, King Edward VIII’s abdication.
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King George VI
King George VI.Hulton-Deutsch Collection/CORBIS/Corbis via Getty

Born December 14, 1885,Queen ElizabethII’s father, King George VI, turned 40 in 1935, taking the throne the following year after his brother, King Edward VIII’s abdication.
02of 12Queen Elizabeth, the Queen MotherLisa Sheridan/Studio Lisa/Hulton Archive/GettyBorn at the turn of the century on August 4, 1900,Queen Elizabeth, the Queen Mother turned 40 on Aug. 4, 1940. Pictured is the Queen Mother lounging outdoors with one of her dogs that year.
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Queen Elizabeth, the Queen Mother
Lisa Sheridan/Studio Lisa/Hulton Archive/Getty

Born at the turn of the century on August 4, 1900,Queen Elizabeth, the Queen Mother turned 40 on Aug. 4, 1940. Pictured is the Queen Mother lounging outdoors with one of her dogs that year.
03of 12Queen Elizabeth IIHulton Archive/GettyThe day after her 40th birthday on April 22, 1966,Queen Elizabethmade a speech at the state opening of parliament.
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Queen Elizabeth II
Hulton Archive/Getty

The day after her 40th birthday on April 22, 1966,Queen Elizabethmade a speech at the state opening of parliament.
04of 12Princess MargaretKeystone/Hulton Archive/GettyQueen Elizabeth’s younger sister, Princess Margaret, celebrated her 40th birthday on August 21, 1970.
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Princess Margaret
Keystone/Hulton Archive/Getty

Queen Elizabeth’s younger sister, Princess Margaret, celebrated her 40th birthday on August 21, 1970.
05of 12Prince PhilipGettyQueen Elizabeth’s husband, the Duke of Edinburgh turned 40 on June 10, 1961. He died on April 9, 2021 at nearly 100 years old,
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Prince Philip
Getty

Queen Elizabeth’s husband, the Duke of Edinburgh turned 40 on June 10, 1961. He died on April 9, 2021 at nearly 100 years old,
06of 12Prince CharlesGeorges De Keerle/GettyThe Prince of Wales celebrated his 40th birthday on Nov. 14, 1988. The week before his birthday, he visited France as part of an official visit, pictured.
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Prince Charles
Georges De Keerle/Getty

The Prince of Wales celebrated his 40th birthday on Nov. 14, 1988. The week before his birthday, he visited France as part of an official visit, pictured.
07of 12Princess AnneGeorges De Keerle/GettyThe only daughter ofQueen Elizabeth, Princess Anne celebrated her 40th birthday on August 15, 1990.
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Princess Anne

The only daughter ofQueen Elizabeth, Princess Anne celebrated her 40th birthday on August 15, 1990.
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Peter Phillips

The eldest ofQueen Elizabeth’s grandchildren and Princess Anne’s firstborn, Peter Phillips turned 40 on Nov. 15, 2017. Pictured, Phillips attends an Easter gathering at Windsor Castle in April 2018.
09of 12Prince EdwardTim Graham Photo Library via GettyBorn in 1964 and the youngest ofQueen Elizabeth’s children, Prince Edward rang in his 40th birthday on March 10, 2004.
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Prince Edward
Tim Graham Photo Library via Getty

Born in 1964 and the youngest ofQueen Elizabeth’s children, Prince Edward rang in his 40th birthday on March 10, 2004.
10of 12Zara TindallSamir Hussein/WireImageTindall isQueen Elizabeth’s eldest granddaughter — her mom is Princess Anne — and she turned 40 on May 15, 2021. One month later, she attended the 2021 Royal Ascot.
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Zara Tindall
Samir Hussein/WireImage

Tindall isQueen Elizabeth’s eldest granddaughter — her mom is Princess Anne — and she turned 40 on May 15, 2021. One month later, she attended the 2021 Royal Ascot.
11of 12Meghan MarkleArchewell.comMeghan Markle, Duchess of Sussex, celebrated the big 4-0 with her 40x40 initiative, releasing a video on theArchewell Foundationwebsite to announce “a global effort encouraging people around the world to commit to giving 40 minutes of their time to support women going back to work.“She did so with the help of comedian Melissa McCarthyandacheeky appearance from a jugglingPrince Harry.
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Meghan Markle
Archewell.com

Meghan Markle, Duchess of Sussex, celebrated the big 4-0 with her 40x40 initiative, releasing a video on theArchewell Foundationwebsite to announce “a global effort encouraging people around the world to commit to giving 40 minutes of their time to support women going back to work.”
She did so with the help of comedian Melissa McCarthyandacheeky appearance from a jugglingPrince Harry.
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Kate Middleton
Kate Middleton.Paolo Roversi

There were several personal touches in the photos (including nods to her late mother-in-law, Princess Diana, and her grandmother-in-law, Queen Elizabeth), but one of the sweetest is that husband Prince William and the couple’s children, Prince George, Princess Charlotte and Prince Louis,got to choose a favorite portrait (the close-up at center) to share.
source: people.com