“One of Maxwell’s best friends is North,” Simpson told Us Weekly, before revealing that the girls, who live in the same area in California, play on the same basketball team that’s coached by Simpson’s husband, former NFL star Eric Johnson.

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2. Blue Ivy Carter and Apple Martin

Blue Ivy Carter, 10, and Apple Martin, 18, have developed a close bond over the years as their parents, A-list couples Beyoncé and Jay-Z and Gwyneth Paltrow and her ex-husband, Coldplay frontman Chris Martin, are long-time friends.

The pair grew up hanging out together, from walking hand-in-hand at the Super Bowl when their parents performed together on stage, to celebrating a brunch and sleepover on Apple’s 12th birthday. Most recently, in March, they were spotted together with matching Minnie Mouse ears at Disneyland with their fathers.

3. Emme Muñiz and Seraphina Affleck

4. Harper Beckham and Santiago Bastón

Longoria’s son, Santiago Bastón, four, is also close to Harper. Despite being seven years older than “Santi”, the Beckhams’ only daughter clearly adores looking after him whenever the families get together. Harper Seven is often seen holding him lovingly.

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5. Chicago West, Stormi Webster and True Thompson

Often gathering to eat, play, and go on holidays together, they are growing up super-close as “best friends for life” – exactly as Kim predicted on her Twitter when the babies began rolling over together for the first time.

6. Zachary and Elijah John, and Gideon and Harper Harris

Long-time friends Elton John and How I Met Your Mother star Neil Patrick Harris not only enjoy double dates together, but got to share the joy of becoming parents at the same time via surrogacy back in 2010, per People.

“We are beyond lucky to have such wonderful friends in our lives. We have spent seven summers with these fantastic and generous men. The years get better and better as our kids become closer and closer. Traditions are the best,” Harris’ husband, David Burtka, wrote in an Instagram post about one of the trips.

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7. Tennessee Toth and Rocky Prinze

Since starring together in Cruel Intentions in 1999, Reese Witherspoon and Sarah Michelle Gellar have built a solid friendship, and both welcomed sons in September 2012. And just like them, their boys – Tennessee Toth and Rocky Prinze – have also become besties. “Reese’s son and my son are best friends,” Gellar told Entertainment Tonight, adding that, sometimes, they even carpool together.

8. Malcolm Mulaney and Lyla Golding

The infants had the first play date earlier this year and quickly got along as Lyla Golding sweetly kissed Malcolm Mulaney on the head in a bid to make friends. Aww.

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9. Gene Fischer and Ben Cohen

Both born in 2019, the sons of comedian Amy Schumer and talk-show host Andy Cohen – Gene Fischer and Ben Cohen – reportedly hung out several times before the pandemic came along.

So their celebrity parents even arranged a short virtual play date while the US stars were in quarantine, linking up on screen on Cohen’s show Watch What Happens Live with Andy Cohen. “Ben misses Gene,” Cohen admitted on the segment, as Amy Schumer concurred, exclaiming, “Yes! They’re little friends!”

10. Alexis Olympia Ohanian and Sienna Princess Wilson

They both welcomed their daughters, Sienna Wilson and Alexis “Olympia” Ohanian, in 2017. The little girls started “hanging out” when they were still in their mothers’ tummies, but didn’t have their first “official” play date until the families found themselves in Cannes at the same time by coincidence in 2019, according to People.