Baby Phoenix is sliving his best life.
After all, Paris Hilton and husband Carter Reum threw their son the sweetest shell-ebration for his first birthday.
"It's Phoenix's first birthday and we have a ‘sliving under the sea' theme," the 42-year-old explained in her Jan. 27 TikTok. "I'm so excited. I've thrown amazing birthday parties my whole life, so now to be able to do this for my little boy is just such a special memory."
The birthday boy was seen sporting a Fendi shirt, stylish cap and white sunglasses, while Paris wore a blue gown with a tiara and white cat-eye sunglasses.
The birthday party, which featured sand art, a petting zoo and a ball pit, also included a star-studded guest list. Kelly Osbourne and son Sidney, 14 months; Lance Bass and twins Alexander and Violet, 2; Selma Blair; Rumer Willis and daughter Louetta Isley, 9 months, were all in attendance.
One clip of the underwater-themed festivities showed off the backyard adorned with tons of balloons shaped like sea animals and bubbles, as well an arch with Phoenix's name alongside a massive clam with a pearl that reads "#slivingmom."
In another TikTok, Paris was having a blast with a giggling Phoenix in a ball pit. And she captioned the sweet video, "Healing my inner child."
@parishilton Baby P’s 1st Birthday????????????
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Paris—who also shares daughter London, 2 months, with Carter—is taking in every minute of this chapter in her life.
"I am loving my mom era," Paris shared on Today in November. "I just feel so at peace. I'm just so happy, so grateful for my husband and this beautiful family and life we are building together. And I couldn't imagine anything else."
And the mother of two couldn't be more grateful to have Carter by her side.
"It's been such a special time," she told E! News in October. "My little baby boy is my world and he's made my life feel so complete. My husband is just the sweetest, kindest, most loyal and loving partner—just my everything."
Keep reading to see more shrimp-ly adorable pics of Paris and Phoenix.
Kisses From Mommy
The heiress and her son Phoenix appear in a sweet TikTok posted just before New Year's Eve 2023.
Think Pink
After Paris Hilton announced that she and husband Carter Reum welcomed daughter London, she posted this photo of herself and son Phoenix in front of a pink Christmas tree.
She wrote in the caption, "Celebrating our baby girl London with a pink Christmas!"
Happiest Place on Earth
Paris took Phoenix to Disneyland to celebrate his first Christmas.
Easy Rider
"My precious little one, you are more than a dream come true. You make my life complete," Paris wrote on Instagram in January 2024. "Every day with you is a priceless gift, and I’m endlessly grateful to be your mommy."
Giving Thanks
Paris and Carter celebrated Phoenix's first Thanksgiving with a giant turkey feast.
Little Flyer
Phoenix was already racking up frequent flyer miles before his first birthday.
Burning Bright
The Simple Life alum snuggled Phoenix under a Chanel neon light.
Simply Adorable
The mother-son duo shared a loving glance.
Burberry Baby
Little Phoenix rocked Burberry for his first trip to New York City.
Family Moments
Nicky Hilton's daughters Lily-Grace Victoria and Theodora "Teddy" Marilyn spent some time with their baby cousin Phoenix.
Good Morning
Paris woke up to Phoenix all dressed up in an adorable chicken beanie on Halloween morning.
Little Elmo
Phoenix looked adorable dressed as Elmo for spooky season.
Pool Day
Paris and her son made a splash on Labor Day 2023.
Big Smiles
The DJ and Phoenix shared a laugh during a mother-son stroll in the park.