"I'm so excited to finally announce that Carson, [my son Kevin "Leo" McAllister] and myself are expecting Baby No. 2!" Witney shared after dancing her first routine of the night with her celebrity partner Wayne Brady.
After the ballroom audience cheered and clapped, Witney continued, "So, I'm so blessed, and this just felt like a really, really good time to share it! And I can finally share it, which is great!"
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"Baby McAllister coming Jan 2021!!!!! We can't even contain our excitement and joy right now," Witney wrote alongside a photo of herself embracing her husband while holding sonogram photos and a positive digital pregnancy test.
Witney, who married her high-school sweetheart in Salt Lake City on New Year's Day in 2016 after dating for four years, told Us Weekly in October 2019 that she had baby fever and wanted to have a child with Carson "so bad" soon.
"We're not really putting a timestamp on it, just when we feel ready," Witney told the magazine at the time. "I get so baby hungry though. Like, every time I see a baby it breaks my heart. I want one."
Witney previously worried, however, about one "big issue" in regards to getting pregnant.
"Can you start a family and still have a career and still dance?" Witney questioned, according Us. "[Peta Murgatroyd] has been a really good mentor to us through what we would do when we eventually have kids. She's been awesome."
Witney had also revealed she "wants a lot of kids" but "four is going to be the [maximum]" for her family.
Witney and her best friend, fellow Dancing with the Stars pro Lindsay Arnold, are very in sync with each other. Shortly before Witney welcomed Leo into the world, Lindsay gave birth to her first child, a baby girl named Sage, in November 2020.
And Lindsay is also currently pregnant with her second child, another baby girl.
Days before Lindsay gave birth to Sage, she told Entertainment Tonight that she was looking forward to being a first-time mom with Witney by her side.
"It's actually insane," Lindsay shared in late 2020.
"We've done so many things in our lives together, so it's like, naturally, why wouldn't we get pregnant together? It's so funny because you can't really plan a pregnancy. I mean, you can plan when you want to try, but it's not like it's always going to happen when you want it to."
Lindsay added, "It's perfect we have a boy and a girl. I feel like it'll be good because boy and girl friend relationships are so much fun. They can be partners, maybe girlfriend, boyfriend, who knows."