Are Prince William and Duchess Kate (née Middleton) expanding their brood? It’s a possibility! Though the royal couple already has three children — Prince George, 6, Princess Charlotte, 4, and Prince Louis, 18 months, it looks like they “would love to have one more child,” according to a source who spoke to Us Weekly.

Each of their kids are roughly two years apart, which contributes to why they’re so close. That being said, having another baby in the near future would be ideal for Louis to have someone to bond with. “They love playing together and being creative,” the insider divulged about the siblings. “Painting, baking and building things are all activities they enjoy, and now that Louis’ a bit older, he gets involved too.”

The Royal Family at the Trooping Colour Ceremony
Tim Rooke/Shutterstock

Despite the fact that Kate and William’s little ones get along well overall, they still argue just like all siblings do. “[It’s] usually over silly things like toys or what TV shows they want to watch, but most of the time they get on,” the source added.

While the royal kids may be super young, they already have very distinct personalities. For instance, Louis is “a mommy’s boy.” Meanwhile, George and Charlotte couldn’t be more opposite. “Charlotte’s extremely confident and loves attention, whereas George is more reserved, although he is starting to come out of his shell,” the insider told the outlet. “George is always looking out for his younger brother and sister and is already showing traits of making an excellent leader.” We’re not surprised George is taking after his father!

Someone else to do the same is baby Archie, who is basically Prince Harry‘s twin. Not only do the father and son look very alike, but they also share a special connection. “When Harry goes off to do his own thing, Archie will squeal with excitement when he sees him again,” a source exclusively told Life & Style. “He’s a real daddy’s boy, but you can tell he also loves his mom, [Duchess Meghan.]

So far, the duke and his 5-month-old share the same sense of humor. “Harry’s a real joker and spends hours on end making Archie giggle away. He says seeing his son smile is the best feeling in the world,” the source added. How sweet!