Jamie, 31, gave birth to a daughter, Henley Grace, on Tuesday, August 22, just a couple of days before her due date.
"I've never been more in love. @henleygracehehner, you're mommy's everything," Jamie captioned an Instagram photo on Tuesday of the baby's hand resting on her finger.
Henley was born at 5:24AM and weighed eight pounds and two ounces, People reported. She also measured 20.2 inches long.
"Mommy and baby are doing well and Daddy is in pure bliss," Jamie's representative told the magazine.
The pair also created an official Instagram account for their little bundle of joy and posted a photo of 33-year-old Doug holding Henley underneath a blanket on Tuesday.
"Wrapped around my daddy's finger already. #skintoskin #daddysgirl #newborn," read the photo's caption.
Jamie and Doug's gender reveal party aired as part of a Married Life special on FYI in late April. Two months prior, the reality TV couple revealed why the name Henley sounded like a great option for their baby on the way.
"When Doug and I first got married -- we were married at first sight, so we didn't obviously know each other very well -- and the first morning, we wake up and he goes, 'You're Jamie Nicole Otis, and I'm...' 'Douglas Edward Henley?'" Jamie recalled.
Jamie first revealed she was pregnant with a "rainbow baby" in January, which was six months after she and Doug lost their first child, a son named Johnathan, while she was four months pregnant in 2016.
Jamie discovered she was expecting again on December 20, 2016, which ironically just so happened to be Johnathan's due date.
Jamie and Doug met on Season 1 of Married at First Sight in 2014, two years after Jamie competed for the heart of Ben Flajnik on Season 16 of ABC's The Bachelor in 2012.
The New Jersey residents decided to stay married at the end of the six-week experiment and then proceeded to star on their own spinoff, Married at First Sight: The First Year in 2016.