David Fisher/REX/ShutterstockPrince George is a big brother once again!
The future King of England has a new little sibling to watch out for, a baby brother this time! George's parents, Prince William and Kate Middleton welcomed their third child on Monday morning.
Prince George and Princess Charlotte were spotted arriving at the hospital on Monday afternoon to meet their new brother. And now that the family has welcomed a new member, we're taking a trip down memory lane to George's earliest years.
The Duke and Duchess of Cambridge's eldest child, who was born on July 22, 2013, will celebrate his fifth birthday in July. But before that, let's look back at the adorable boy's baby pics!
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.
The royal baby's name has yet to be announced! Let us know what you think the couple will name their baby boy in the comments!