Every video Paris Hilton posts of her kids is adorable, but her latest might just take the cake. In a new TikTok, The Simple Life star shared a heart-warming moment of her 9-month-old daughter London giggling uncontrollably at her older brother Phoenix, 18 months.

Money can’t buy that strong of a sibling bond, and it’s truly the cutest thing ever.

“Nothing better than my babies becoming best friends🥹✨” Hilton wrote on TikTok. “Those giggles warm my heart! ✨❤️ #SlivingMom.”

The video was taken on Hilton’s private jet, where the two babies are hanging out in cozy pajamas for the flight. Phoenix is bouncing up and down, making London crack up laughing.

Her cute dimples and toothless smile is so precious — as is her little patch of light brown hair that exactly matches her big bro.

Phoenix stops and looks at the camera, causing London’s laughs to fade a little. But then he starts wiggling around again, and she just can’t handle how funny it is! She is giggling and cooing away, clearly completely enthralled by her brother.

“Their laughter is contagious! Can’t wait to see more of their playdates!” one person commented. Someone else wrote, “Those two are going to be in all kinds of mischief. Double trouble.❤️”

“They are so adorable, my children are close in age and oh what a beautiful bond they have. It only gets better and better everyday💗💗💗💗” another wrote. A different person commented, “OMG! The cuteness is off the charts! They are always happy- a credit to you Paris!!🥹🩷🩷🩷”

The Paris In Love star often posts about her kids, who she shares with husband Carter Reum. Earlier this month, she shared a video of their messy playroom as the siblings hung out together and played with toys.

Phoenix shakes a toy sitting up, while London pulls a toy close to her while propped up on her stomach. “I love you two so much,” Hilton tells her kids in the video.

Paris Hilton and Carter Reum at the Pre-GRAMMY Gala held at The Beverly Hilton on February 3, 2024 in Los Angeles, California. (Photo by Gilbert Flores/Billboard via Getty Images)Gilbert Flores/Billboard via Getty Images

“I want them to be best friends and for Phoenix to watch out for his little sister,” the “Chasin’” singer told SheKnows in Nov. 2023. “That’s why I wanted to have a boy first, because I feel like so many bad things wouldn’t have happened to me when I was a teenager if I had a big brother to watch out for me.”

She added, “I am loving being in my mom era. It’s my favorite era yet. I just feel like my life feels so complete.”