Nicky Hilton Welcomes Sister Paris Hilton to "Mommyhood" in Sweet Message

Nicky Hilton agrees: Paris Hilton is totally sliving.

The model celebrated her sister welcoming her first child with husband Carter Reum by sharing a sweet post on Instagram congratulating her on her new journey.

"Welcome to mommyhood @ParisHilton!" she wrote on Jan 25 alongside a photo of the two as kids sitting on their mom Kathy Hilton's lap. "So so incredibly happy for youuu! It's the most beautiful ride. There is no greater love. You are going to be the best mommy. What a lucky boy!"

Tessa Hilton—the wife of Paris's little brother Barron Hilton—chimed in to celebrate the little one's arrival, writing, "The luckiest baby boy!"

Paris and Carter confirmed on Jan. 24 that she had welcomed their first child together. People reports they welcomed their son via surrogate.

Paris Hilton & Carter Reum: Romance Rewind

"It's always been my dream to be a mother and I'm so happy that Carter and I found each other," Paris told People in a statement. "We are so excited to start our family together and our hearts are exploding with love for our baby boy."

The reality TV star shared the exciting news on her Instagram with a photo of her baby holding her thumb, captioning the pic, "You are already loved beyond words."

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The new parents got engaged in February 2021 and married later that November. Shortly after tying the knot, Paris expressed her excitement on becoming a mom in the future.

"I cannot wait," she said in a January 2022 episode of E! News' Daily Pop, revealing that she would like "two or three" kids.

"I would want twins first," Paris added. "I don't know it's hard to say. I always wish I had an older brother because I feel like if I did then he would protect me and things like that in school."