The proud mom gave birth to her little new bundle of joy on Saturday, May 13, one day before Mother's Day. To break the exciting news, she shared a family photo of her, her spouse and their kids in the hospital.
Witney began her caption by writing, "My boys, could there be a better Mother's Day gift??" She added, "We are on cloud nine and soaking in every second."
Hours prior, Witney turned to Instagram Story to let her fans know that the baby "is here." She made the announcement alongside a photo of her holding her newborn son in the hospital.
In a follow-up story, Witney wrote, "Baby is getting 100% oxygen and doing great but breathing a little fast." She continued, "They are trying to get it to slow down a little in NICU. Send prayers!"
Witney confirmed her pregnancy in the November 14 episode of the "Dancing with the Stars". Speaking to co-host Alfonso Ribeiro, she said, "I'm so excited to finally announce that Carson, Leo and myself are expecting baby number two. I'm so blessed. This just felt like a really, really good time to share it. I can finally share it, which is great!"
Witney, who's partnered up with US TV personality Wayne Brady on the series, took to Instagram afterward to reflect on the moment. She posted on her Story, "This was so special to announce on the show that I love so much. Carson and I feel so blessed to finally share it with you all! Thanks so much for the love. Love you all!"
Meanwhile, on her page, Witney declared, "Baby McAllister #2 coming end of May!" The dancer, who married Caron in 2016, added, "We feel so blessed, and I can't wait to see Leo be a big brother (sic)."