Nicky Hilton and Husband James Rothschild Are Officially Outnumbered With Latest Baby

Watch out world, party of five coming through! Nicky Hilton and her husband James Rothschild welcomed baby number three to the family, making them officially outnumbered by children.

The 38-year-old fashion designer announced her big news on her Instagram with a black and white silhouette photo of the proud mom and dad. "We are officially a party of 5! Welcome to the world sweet boy," she captioned the photo. "Mom, dad and big sisters could not be more smitten." The couple has not released the baby boy's name or date of birth yet. Baby boy joins big sisters, Theodora "Teddy" Marilyn, 4, and Lily-Grace Victoria, 5.

Less than a month ago, Hilton Rothschild shared an Instagram photo of her and her sister-in-law Tessa Hilton's baby bumps enjoying the summer sun. The photo of the two in matching swimsuits was captioned, "Suns out ☀️ Bumps out ?. Can't wait for the cousins to meet each other! ?" Tessa, married to Barron Hilton, is expecting their second child toward the end of summer.

It was no surprise that baby number three was a boy. Earlier this year, the mom-to-be celebrated the new baby with an all things blue baby shower hosted by her sister, Paris Hilton, 41, alice + olivia founder Stacey Bendet, and beauty entrepreneur Tina Chen Craig. The party featured a decor of blue balloons, various-sized teddy bears, bear-shaped cake with fluffy frosting, and cake pops.

Hilton and Rothschild's happily ever after started in Italy when they met at friend Petra Eccleston and James Stunt's wedding in 2011. Three years later, Rothschild, 34, popped the question in Italy, followed by a road trip through Europe. The two married at London's Kensington's Palace in July 2015. They exchanged their vows in the palace grounds in front of an impressive guest list of friends and family that included Vera Wang, Chelsea Clinton, Naomi Campbell and many others. A year later, their first daughter Lily Grace joined the family in July 2016 and then in December 2017, they welcomed daughter Teddy Marilyn. The fashion designer announced her third pregnancy on Instagram with a photo of her cradling her baby bump back in February, captioned, "They say the best things in life come in threes."

Hilton posted a touching tribute to her mom on Mother's Day saying, "Thank you for your love, strength, guidance and humor. You are beautiful inside and out and I am so lucky to call you my mom. A mother is your first friend, best friend and your forever friend." She also gushed about being a mom herself in another post. She shared a video with her favorite things about being a mom and the fun things she used to do as a child that she now gets to do with her daughters. "We watch cartoons and eat cereal and go to theme parks. I get to just be a kid again," she explained.