Photo: Matt Porteous/PA

01of 24The Cambridge family’s 2020 Christmas card.Matt Porteous / The Duke and Duchess of Cambridge/Kensington Palace via GettyKate Middletonflashed a big smile for the family’s 2020 Christmas card — almost rivaling littlePrince Louis' grin!
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The Cambridge family’s 2020 Christmas card.Matt Porteous / The Duke and Duchess of Cambridge/Kensington Palace via Getty

Kate Middletonflashed a big smile for the family’s 2020 Christmas card — almost rivaling littlePrince Louis' grin!
02of 24Kate Middleton, Prince Louis and Princess Charlotte.Aaron Chown - WPA Pool/GettyWhen the family stepped out for a Christmas show in December 2020, Kate pulled double duty: cradlingPrince Louison her lap and comfortingPrincess Charlotte.
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Kate Middleton, Prince Louis and Princess Charlotte.Aaron Chown - WPA Pool/Getty

When the family stepped out for a Christmas show in December 2020, Kate pulled double duty: cradlingPrince Louison her lap and comfortingPrincess Charlotte.
03of 24Kate joined her family — giving Louis a boost in her arms — to applaud caregivers amid the coronavirus pandemic in April 2020.
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Kate joined her family — giving Louis a boost in her arms — to applaud caregivers amid the coronavirus pandemic in April 2020.
04of 24Pool/Samir Hussein/WireImageWhenPrince GeorgeandPrincess Charlottemade their royal Christmas debut in Dec. 2019, Kate was a proud mama. She held hands with her daughter and even modeled a perfect curtsy for her to replicate.
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Pool/Samir Hussein/WireImage

WhenPrince GeorgeandPrincess Charlottemade their royal Christmas debut in Dec. 2019, Kate was a proud mama. She held hands with her daughter and even modeled a perfect curtsy for her to replicate.
05of 24Aaron Chown/Getty ImagesAfter missingPrince George’s first day of school due to illness during her third pregnancy, the royal mom was all smiles accompanyingPrincess Charlotteto her first day.
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Aaron Chown/Getty Images

After missingPrince George’s first day of school due to illness during her third pregnancy, the royal mom was all smiles accompanyingPrincess Charlotteto her first day.
06of 24Princess Charlotte and Kate Middleton on charity sailing day 2019.ADRIAN DENNIS/AFP/GettyKate jumped into mom mode during August 2019’s King’s Cup sailing race. WhenPrincess Charlottestuck out her tonge at the gathered crowd, she got a quick scolding!
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Princess Charlotte and Kate Middleton on charity sailing day 2019.ADRIAN DENNIS/AFP/Getty

Kate jumped into mom mode during August 2019’s King’s Cup sailing race. WhenPrincess Charlottestuck out her tonge at the gathered crowd, she got a quick scolding!
07of 24Kate Middleton, Prince Louis, Prince George and Princess Charlotte.Tim Rooke/ShutterstockThe Duchess of Cambridge showed she was just a regular mom during an outing in summer 2019 to watch a charity polo match in whichPrince WilliamandPrince Harryplayed, even eating lunch out of the back of a car.
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Kate Middleton, Prince Louis, Prince George and Princess Charlotte.Tim Rooke/Shutterstock

The Duchess of Cambridge showed she was just a regular mom during an outing in summer 2019 to watch a charity polo match in whichPrince WilliamandPrince Harryplayed, even eating lunch out of the back of a car.
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WhilePrincess CharlotteandPrince Georgekicked around a soccer ball, Kate was on the move following aroundPrince Louis. At one point, the little royal tried on mom’s sunglasses!
09of 24Prince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Tim Rooke/ShutterstockCambridge, family of five! Kate couldn’t get enough ofPrince Louis' royal wave during his Buckingham Palace balcony debut during the 2019 Trooping the Colour celebrations.
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Prince Louis, Prince William, Kate Middleton, Prince George and Princess Charlotte.Tim Rooke/Shutterstock

Cambridge, family of five! Kate couldn’t get enough ofPrince Louis' royal wave during his Buckingham Palace balcony debut during the 2019 Trooping the Colour celebrations.
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Matt Porteous/PA

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PA Images/Sipa

12of 24It wasMeghan MarkleandPrince Harry’s wedding day, butPrincess Charlottestole the show with her adorable wave — with encouragement from mom!
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It wasMeghan MarkleandPrince Harry’s wedding day, butPrincess Charlottestole the show with her adorable wave — with encouragement from mom!
13of 24Karwai Tang/WireImageKate turned husbandPrince William’s charity polo match into a family day outdoors in June 2018, playing in the grass withPrince GeorgeandPrincess Charlotte.
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Karwai Tang/WireImage

Kate turned husbandPrince William’s charity polo match into a family day outdoors in June 2018, playing in the grass withPrince GeorgeandPrincess Charlotte.
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James Whatling/MEGA

15of 24Chris Jackson/GettyThe kids came along in July 2017 for a tour of Poland and Germany, making for some adorable family snaps.
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Chris Jackson/Getty

The kids came along in July 2017 for a tour of Poland and Germany, making for some adorable family snaps.
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On top of being sisterPippa Middleton’s maid of honor at her May 2017 wedding, Kate was in full mom mode with page boy George and bridesmaid Charlotte.
17of 24Kate Middleton, Princess Charlotte, Prince George and Prince William at Christmas 2016.Andrew Matthews - WPA Pool/GettyKate andPrincess Charlotteperfectly coordinated for a Christmas church outing with Kate’s family in December 2016.
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Kate Middleton, Princess Charlotte, Prince George and Prince William at Christmas 2016.Andrew Matthews - WPA Pool/Getty

Kate andPrincess Charlotteperfectly coordinated for a Christmas church outing with Kate’s family in December 2016.
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Pool/Sam Hussein/WireImage

19of 24James Devaney/GettyKate stayed close toPrincess CharlotteandPrince Georgeduring 2016 Trooping the Colour celebrations.
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James Devaney/Getty

Kate stayed close toPrincess CharlotteandPrince Georgeduring 2016 Trooping the Colour celebrations.
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Matt Dunham - WPA Pool /Getty Images

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Kate Middleton, Prince George and Prince William in George’s first birthday portraits.

22of 24Tim Rooke/REX/ShutterstockKate balanced tour life with motherhood during the couple’s visit to Australia in April 2014.Prince Georgeeven got to meet a furry friend at the Taronga Zoo!
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Tim Rooke/REX/Shutterstock

Kate balanced tour life with motherhood during the couple’s visit to Australia in April 2014.Prince Georgeeven got to meet a furry friend at the Taronga Zoo!
23of 24ASON BELL/CAMERA PRESS/REDUXThe proud parents posed withPrince Georgeat his October 2013 christening.
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ASON BELL/CAMERA PRESS/REDUX

The proud parents posed withPrince Georgeat his October 2013 christening.
24of 24Anwar Hussein/WireImageKate’s debut as a mom came in July 2013 with the birth of sonPrince George. They made their debut as a family of three outside the London hospital where George was born.
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Anwar Hussein/WireImage

Kate’s debut as a mom came in July 2013 with the birth of sonPrince George. They made their debut as a family of three outside the London hospital where George was born.
source: people.com