Nicky Hilton Says 'The Best Things In Life Come In Threes' While Flaunting Baby Bump

Nicky Hilton Rothschild is flaunting her adorable baby bump on social media!

The socialite, 38, wowed in a formfitting, black long-sleeved dress that came from Self-Portrait in a picture she added to her Instagram feed on Wednesday. Her garment beautifully accentuated her growing baby bump. The piece of clothing also featured a plunging neckline contoured with crystal embellishment that highlighted her décolletage.

Nicky had her blond hair styled by celebrity hairstylist Chris Dylan with a side parting and soft waves, which framed her face. She sported an elegant makeup look done by makeup artist Katrina Guevara and black polish for her nails. For accessories, she only wore a pair of dangling diamond earrings.

"They say the best things in life come in threes. ???" Nicky wrote in the caption, referring to her three kids.

She shares daughters Lily-Grace Victoria, 5, and Theodora "Teddy" Marilyn Rothschild, 4, with husband James Rothschild, 37.

This is the first time that the soon-to-be mother of three shared her first pregnancy photo after the news that she is expecting broke last week.

Last week, a rep for Hilton told ET that the couple "will welcome their third child during the summer of 2022" and that "the sex of the baby is still unknown."

During an episode of "Watch Watch Happens Live with Andy Cohen" late last month, host Andy Cohen congratulated Paris Hilton, 40, and her mother Kathy Hilton, 62, about Nicky's pregnancy. He asked if either of them knew the gender of Nicky's unborn child.

"I don't think they're going to find out," the "Real Housewives of Beverly Hills" star said, adding, "We never did, so, I don't know, whatever floats your boat."

Nicky and James tied the knot in a lavish ceremony at Kensington Palace in London, England in July 2015. They welcomed their firstborn, Lily-Grace, almost exactly a year to the day of her first wedding anniversary. Four years later, they introduced their second child, Teddy, to the world.

During a chat with Interview Magazine in April, she talked about motherhood and the struggles she faced while living in the pandemic. However, she felt grateful for spending a lot of time with her family.

"Well, this past year I, unbeknownst to me, became a nursery school teacher, which I had not planned on," Nicky said. "But this time I’ve spent with my family has has been the silver lining of this whole pandemic for me."

She explained, "At the beginning of the pandemic, when we were all on serious lockdown, I had breakfast, lunch and dinner with my family, my husband, and two daughters, every single day. I think it was for 96 days."

Nicky admitted though she was "Very, very grateful when school opened. Both of my girls are in school full-time with their masks and they love it and they’re so happy to be back."

The French Sole fashion designer also admitted that she's "so happy that they had each other during this pandemic, for their sake and my sake."

Despite being very privileged, Nicky said she's "a pretty eco-conscious person" and that she teaches her kids to be the same.

"I’m not perfect, but I try and do my best," she shared. "This past year, I became a vegetarian for a bit and I’ve pretty much given up red meat. When I leave a room, I’ll turn the lights off. We bring reusable bags to the grocery store."

She added, "My daughter’s actually so cute—on Fridays they bring home their artwork in these big plastic Ziplocs, and today we were getting ready for drop-off and she had a big canvas tote with her and she said, 'I’m going to bring this to put my art in. I don’t want them to give me a plastic bag.' That made my heart smile."

Since becoming a mom, Nicky became an early riser as she loves "waking up before my kids and just having that moment to breathe, and then just going into the kitchen with my husband, having coffee, and just talking about our day and getting all of my boring work calls and stuff out of the way."

Although she admitted she has "never been a morning person ’til I had children."