"WE'RE PREGNANT! And I'm over the moon! I'm so excited to bring our first child into this life we have created together! I've been pretty quiet on Instagram lately. I've been avoiding posting stories and photos as much as I normally do because we've been taking this time to really enjoy all the great blessings we have in our life," Jessica captioned a photo of the couple in which she's holding a sonogram image.
"Considering our engagement was leaked before we could tell anyone, it's been so great to be able to share our new addition with our loved ones before making this announcement!"
Jessica is 11 weeks into her pregnancy and her "little angel" is due on April 11, 2019, which just so happens to be two days before Cody's birthday.
"We're honored to be adding the FIFTH Big Brother baby to the world! We can't wait to meet you little one and we already love you more than anything! #MomToBe #BabyOnBoard," Jessica continued.
Cody also posted a photo of Jessica from a party in which she was pretending to take a mugshot while holding a sign that read, "Baby Mama. Crime: Home by 8:00."
The photo was likely taken at her bachelorette party, which took place in early September.
"We are beyond pleased. Thank you for all who have stood with us in support... and thank you to those who have opposed us to make all the victories worth it. I'm looking forward to Jessica being my wife and the matriarch of the Nickson establishment in Texas. What an incredible year."
In addition to the two photos of Cody putting his hands on Jessica's stomach earlier this week, Jessica also sparked pregnancy speculation when she posted an image on her recent Instagram Story, "Is she pregnant or just getting fat. That's a secret I'll never tell."
Cody is also dad to a young daughter Paisley Nickson from a previous relationship. After Jessica and Cody moved in together in Texas, Jessica became a stepmother to Paisley.
The couple, who got engaged on February 13, are currently documenting their life on their Living Jody YouTube channel.
In late August, Jessica and Cody revealed they set a wedding date of Sunday, October 14, 2018.
Jessica and Cody fell in love onBig Brother's 19th season and developed an "us against the house" mentality when they found themselves to be the targets week after week.
Both players were physical threats, and Jessica also had a great strategic and social game going on her own.
Jessica was given an opportunity to leave Cody behind and advance herself in the game, but she chose to stand by her man, who was ultimately crowned "America's Favorite Houseguest" thanks to votes his girlfriend helped rally for him in the real world once she was evicted from the house.
The pair then went on to compete on The Amazing Race's 30th season earlier this year, and they crossed the finish line in first place and won $1 million.