Paris Hilton Says Son Has ‘Built-in Best Friend’ with Younger Sister (Exclusive)

Paris Hilton‘s two children are the best of friends.

The multi-hyphenate star, 44, tells PEOPLE in an exclusive interview that son Phoenix Barron, 2, and daughter London Marilyn, 22 months, couldn’t have a stronger sibling bond.

“They are best friends,” Hilton says, adding that her two kids, whom she shares with husband Carter Reum, are “inseparable” and “always together.”

“It’s like they’re twins,” the proud mom continues. “It’s just the cutest thing. It’s like a built-in best friend for life.”

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Hilton and Reum, 44, welcomed their first baby together in January 2023.

“It’s always been my dream to be a mother, and I’m so happy that Carter and I found each other. We are so excited to start our family together, and our hearts are exploding with love for our baby boy,” r,” the Parívie founder told PEOPLE at the time of son Phoenix’s birth.

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Less than a year later, the couple expanded their family in November 2023 through the birth of their second child.

Hilton shared the news on Thanksgiving by posting a photo on Instagram of a pink baby outfit with the name London printed across a long-sleeve top. “Thankful for my baby girl🥹🩷👶🏼,” she captioned the post.

According to Hilton, life as a mom to two under two is flying by. “Oh my God, they’re growing up so fast. They’re both so tall and so smart,” she says.

The Paris & Pups creator adds that Phoenix is “the best big brother” because “he loves his little sister so much and is so cute with her and so protective, always watching after her,” and the feeling is mutual with London, because she “adores him and looks up to him so much.”

Hilton also tells PEOPLE her two kids have been making lots of memories together after their family recently moved into a new home.

“They are loving it in their new rooms, decorating them, and just running around in the backyard, doing adventures, going on the waterslide together, having pool parties, with all the cousins coming over,” the “Stars Are Blind” singer says. “It’s just been so special, creating all these memories in our forever home.”