"Tatum Booth Mock 12/6/22 6:13 a.m.," Tia captioned a sound clip of herself holding her newborn for the first time. "Best day of our lives."
Tia announced she was pregnant with her first child on Father's Day in June by posting a sweet tribute to her late father as well as Taylor, a California-raised construction and project manager who currently lives with Tia in Nashville.
"While I wish I could tell my dad all the good news in person, it brings me peace that he knows about it long before I do... I have no doubt my dad had a hand in this," Tia captioned a black-and-white image of the couple embracing her small baby bump.
She added, "Happy heavenly Father's Day to the first man I ever loved and Happy soon-to-be Father's Day to my forever."
Tia said she took "at least four" pregnancy tests and a blood test before sharing the big news with Taylor.
"Taylor's reaction was fine. He wasn't bummed or anything... He was like, 'Sounds good!'" Tia explained on her "Click Bait with Bachelor Nation" podcast this past summer.
Tia said she found out she was "four-and-a-half or five weeks" pregnant just nine days after Taylor proposed marriage and the couple got engaged in April. Tia believes she and Taylor conceived their baby on March 26.
"I was like, 'You are kidding me?! I'm trying to plan the wedding of my dreams.' At this point, I was still trying to [get married] within six months -- getting it done this Fall. And I just could not believe it. At this point, I'm 30."
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Tia said she and Taylor "weren't trying to get pregnant," but at the same time, they "weren't trying very hard not to get pregnant."
Tia recalled being "excited" once she got over the initial shock of her baby and arrived at the conclusion she and Taylor would not be able to have a 2022 wedding.
"I think that was kind of the bummer part," Tia said.
Tia and Taylor got engaged during a "Bachelor Live On Stage" performance in April in Atlanta, GA.
Tia shared her wedding will be in Nashville because it will be a great destination for her relatives from Arkansas and Taylor's family and friends from California to meet.
Taylor made a brief appearance on the "Click Bait" podcast after he popped the question and said of his "Bachelor Live On Stage" proposal, "I thought it would be cool to close Tia's chapter with The Bachelor franchise."
Tia said she had "never been more shocked" than in the moment when Taylor popped the question onstage.
"I did not expect it, not one freakin' little second," Tia noted.
Tia and Taylor were only together for nine months, officially, before they got engaged.
"But we've known each other [as friends] for over a year," Tia previously said after the engagement. "I know people are like, 'It's so fast,' but I'm 30! He's 26. At this point, we don't have to wait... And in Bachelor Nation, it's an eternity!"
She also appeared on Bachelor in Paradise twice, with her first appearance being on Season 5 in 2018 and her latest stint having taken place on Season 7 in 2021.
During her first Bachelor in Paradise appearance, Tia was memorably dumped by Colton Underwood, who subsequently when on to become The Bachelor's Season 23 star. (Three years later, Colton also publicly came out as gay.)