15 candid photos of Prince William, Kate Middleton, and their children over the years

George was less than a year old when he embarked on his first royal tour to New Zealand and Australia alongside his parents, William and Kate.

But for being so tiny, photos of him pulling funny faces at a bilby — a desert-dwelling marsupial — while visiting Sydney Zoo show prove he was anything but shy. George looked to be growling at the bilby while Kate and William smiled on.

Vanity Fair reported that the bilby was actually named George after the young prince.

Clutching onto Kate's shoulders with rosy cheeks and a glint of a smile in his eye was 9-month-old George in photos from later on during the tour.

The little prince was dressed up in an adorable sailor-like outfit, which featured a white collared shirt and dungarees.

Not every candid photograph taken of William and Kate captures a lighthearted moment. In 2015, while the family was en route to the church in Sandringham where Princess Charlotte would be christened, it looked like George had burst into tears.

While Kate, dressed in Alexander McQueen, walked ahead with Charlotte in a stroller, William took up the task of holding a tearful George's hand as they walked on.

An overseas trip to Canada in 2016 marked the first time that William, Kate, and their kids went on a royal tour as a family of four.

During an appearance at a children's party thrown in honor of the military, Charlotte, 1, clutched a balloon flower while being held by her father, William. A sweet moment was captured as he looked down at her with a smile.

After the family arrived at Victoria Harbour Airport, photographs show Kate leaning down to hold Charlotte's hand as they made their way to a seaplane.

According to The Mirror, this was one of a handful of moments the children were seen throughout the royal tour of Canada. In other photographs of the day, Charlotte and George were also shown waving at onlookers.

Upon arrival at Warsaw airport for a five-day tour of Poland and Germany, photographers were able to snap pictures of George and Charlotte staring down at the welcome wagon as the family arrived, Forbes reported.

While George, who was then just shy of 4 years old, seemed to smile, Charlotte looked rather more serious.

Charlotte cried as the family prepared to take a helicopter at Hamburg airport during the last leg of their tour.

The princess, who was only 2 at the time, was pictured in tears as her mother and father tried to calm her before the flight. Older brother George was all smiles as the family made their way onboard the aircraft.

Prince Louis, the youngest child who was born in 2018, made his Trooping the Colour debut alongside older siblings George and Charlotte in 2019.

The three kids were seen peeking out of the windows at Buckingham Palace at the crowds gathered below to see the whole family walk out onto the balcony. Charlotte and Louis were seen pressing their faces against the window in a few hilarious moments captured on camera.

After the children were done peering out of the windows at Buckingham Palace, they joined Kate and William on the balcony to wave at onlookers of the Trooping the Colour ceremony.

In a turn of events captured in this image, Charlotte, Louis, and George appeared to carry out their duties of waving to the crowd while their parents couldn't quite manage to keep a straight face.

Louis joined his mother, aunt, and baby cousin in spectating the King Power Royal Charity Polo Day in 2019, the Express reported.

According to the publication, the prince borrowed Kate's sunglasses and, in a cheeky moment, stuck his tongue out at Meghan and Archie.

George, Charlotte, and Louis were not only wearing coordinating blue outfits but appeared to be in sync pulling funny faces on the balcony at Trooping the Color in honor of the Queen's Platinum Jubilee.

It was Louis, however, whose reactions to the parade especially entertained his family and royal fans watching the action from Buckingham Palace. At first, Louis enthusiastically waved to the aircraft but as the jets became louder, he covered his ears.

The entire family aside from Louis attended Platinum Jubilee celebrations at Buckingham Palace.

George and Charlotte were seated between their parents as they watched live musical performances. All four were pictured laughing and clapping as they enjoyed music from the likes of Adam Lambert and Queen, Diana Ross, Lin Manuel Miranda, and the London cast of "Hamilton."

Shutterstock royal photographer Tim Rooke previously told Business Insider that Charlotte "gets her passion for sport from her parents."

The day after Charles' coronation, William and George waved Union Flags and enjoyed the musical stylings of Katy Perry, Lionel Richie, and Andrea Bocelli at a celebratory concert.

Louis has been known to steal the show at royal events. At Trooping the Colour, he was spotted shushing the crowd and saluting the assembled soldiers.