Will Sage Astor-Prince George Is All Grown Up and Here to Make You Feel Old in 10th Birthday Portrait

Bow down to Prince George's latest milestone.

After all,Will Sage Astor Prince William and Kate Middleton's oldest child is officially reaching double digits, turning 10 on July 22. In honor of the occasion, Kensington Palace released a new birthday portrait on July 21.

George, the second-in-line to the U.K. throne, wears snazzy teal trousers and a buttoned shirt with his sleeves rolled up in the photo, which shows him relaxing on a stone staircase.

The young prince has had quite a busy year since his last birthday, with increased royal responsibilities that came amid a tragic loss for the family. On Sept. 8, the same day he and his siblings, Princess Charlotte, 8, and Prince Louis, 5, began attending Lambrook School in Berkshire, England, Queen Elizabeth II died at age 96.

Less than two weeks later, the royal family honored her at a state funeral, where George and Charlotte were the youngest mourners following her coffin during the procession, walking behind their parents.

George later served as one of King Charles' eight Pages of Honour during the new monarch's May coronation. In fact, George made history as the first future king to assume a role during a royal coronation.

Before the event, royal correspondent Sharon Carpenter told E! News that George's participation "really demonstrates that his parents want him to really have that understanding of the monarchy, and that sort of appreciation and respect for the monarchy that starts at a very young age."

But aside from fulfilling his royal responsibilities, George has also focused on his personal interests over the past year. In December, William and Kate shared a holiday painting he had made on their Instagram.

George has also occasionally been spotted out at sporting events with his parents, most recently the second Ashes test cricket match between England and Australia, where he chowed down on some pizza, and the final day of the 2023 Wimbledon tournament, where Charlotte made her debut at the annual tennis championships.

See more photos of Prince George through the years.

George appears at the Platinum Jubilee Pageant on June 5, 2022.

Charlotte and sister Prince George visit Cardiff Castle to meet performers and crew involved in a special concert celebrating great-grandmother Queen Elizabeth II's Platinum Jubilee in June 2022.

George joins his parents at the Guinness Six Nations rugby match (England vs. Wales) at Twickenham Stadium in London on Feb. 26, 2022.

The prince made a face while at his cousin Princess Eugenie's royal wedding to Jack Brooksbank on Oct. 12.

Prince George looked dapper at the christening of his little brother, Prince Louis.

The royal siblings appeared to have a ball at the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club.

During the 2018 Trooping the Colour, Prince George's cousin Savannah Phillips covered his little mouth.

Prince George served as a Page Boy for Prince Harry and Meghan Markle's wedding.

Prince George visits his little brother Prince Louis for the first time.

For their 2017 Christmas card, Prince William and Kate Middleton shared a photo of them with Prince George and Princess Charlotte in matching blue ensembles.

Prince George looked a tad bit nervous on his first day of school at Thomas's Battersea in the London 

The little prince arrives with his family to Berlin Tegel Airport during an official visit to Germany and Poland in mid-July 2017, just before his fourth birthday.

Prince George met former President Barack Obama in 2017.

The little prince looks a bit bored on the Buckingham Palace balcony with his parents Kate Middleton and Prince William and sister Princess Charlotte.

The prince is an adorable page boy at aunt Pippa Middleton's wedding to James Matthews.

The prince attends a children's party for military families in Canada with his family.

The prince joins parents Prince William and Kate Middleton and sister Princess Charlotte onboard a sea-plane on the final day of their Royal Tour of Canada in October 2016.

Sporting a white shirt with blue accents, Prince George is joined by his sister, Princess Charlotte, during the the historic event marking the Queen's 90th birthday. 

Rocking a set of blue ear protectors, Prince George sits besides his mother in a Squirrel helicopter during a visit to the Royal International Air Tattoo in early July 2016.

The little prince sits on a rocking horse in front of his parents and President Barack Obama during the U.S. leader and wife Michelle Obama's first meeting with him, during a dinner at Kensington Palace in April 2016. The two had given him the toy for his first birthday.

The little dude shows off rosy cheeks as snowflakes fall around him and his precious family.

Prince George enjoyed his first trip to the snow with mom, dad and little sister Charlotte.

The little prince made his Buckingham Palace balcony debut at the event, which celebrated his great-grandmother Queen Elizabeth II's 89th birthday.

George appears in an official palace photo for his third birthday.

Prince George takes a stroll with his mom at Beaufort Polo Club. 

The royal nanny makes sure George can get a good view through the window of Buckingham Palace.

Little George affectionately plants a wet one on his little sister Princess Charlotte's forehead. 

Showing her mama bear instincts, Kate Middleton makes sure her son doesn't fall and tumble down the hill. 

The super duper cute prince sits on the Duchess of Cambridge's lap after watching some polo. 

The prince holds his baby sister Princess Charlotte in these official palace portraits taken by mother Kate Middleton.