‘Secret Lives of Mormon Wives’ star Whitney Leavitt and husband Conner welcome baby No. 3

Whitney Leavitt welcomed her third baby on Wednesday. whitleavitt/Instagram

Whitney Leavitt’s little one has arrived.

The “Secret Lives of Mormon Wives” star revealed to People on Monday that she gave birth to a baby boy named Billy five days prior.

“We are most nervous about having three car seats in our car,” the Hulu personality quipped of her and her husband Conner’s growing family.

The reality star announced her pregnancy on Season 1 of “The Secret Lives of Mormon Wives.” whitleavitt/Instagram She served her family a cake with a positive pregnancy test inside. NBCU Photo Bank via Getty Images

The couple have now “activated the third row in [their] Kia Sorento,” which she called an “intimidating” milestone.

Leavitt, 31, and Conner, who wed in 2016, are already the parents of daughter Sedona, 4, and son Liam, 2.

The pair did not know the sex of baby No. 3 ahead of his arrival, with Leavitt calling the announcement in the delivery room “overwhelming.”

She previously welcomed daughter Sedona, 4, and son Liam, 2. whitleavitt/Instagram She shares the little ones with husband Conner. whitleavitt/Instagram

She joked, “Upon meeting Billy, [the kids] were a bit surprised that they actually didn’t get to decide the baby’s gender. But, they’ve warmed up to him quickly and now all they want to do is hold their new baby brother.”

Leavitt, however, was certain of Billy’s sex before giving birth — despite choosing a gender-neutral name just in case.

“I was very confident … because Billy’s pregnancy was so similar to my son, Liam’s, pregnancy,” she explained.

Leavitt did not know baby No. 3’s sex before his arrival. whitleavitt/Instagram She named her newborn son Billy. whitleavitt/Instagram

The reality star revealed her pregnancy news on the first season of “The Secret Lives of Mormon Wives.”

Notably, she served her family members a cake with her pregnancy test inside after “Clorox[ing] the heck out of it.”

While the influencer opted to leave MomTok at the end of the show, she confirmed earlier this month that she will return for Season 2.

Leavitt and Conner have now “activated” the third row of their car. whitleavitt/Instagram The Hulu personality called this milestone “intimidating.” whitleavitt/Instagram

When the hit show premiered in September, Leavitt emerged as the villain, and this perception put her in a “dark place.”

On an episode of Taylor Lautner’s “Squeeze” podcast last month, she admitted, “Every decision I made, whether I felt like it was expected of me, I still made it.

“There was no context behind why I had made certain decisions,” Leavitt added at the time. “But … that’s that’s the game, I guess.”