The couple also shared a photo with Reality TV World in which they're standing in front of a tree and holding up an ultrasound picture that reads, "Love the Little Things."
In the photo, Danielle and Bobby's two beloved dogs are sitting on either side of them.
Danielle and Bobby -- who were shown choosing to stay committed to each other on Married at First Sight's "Decision Day" episode last week -- will be one of three MAFS couples starring on Lifetime's Married At First Sight: Happily Ever After, which premieres Tuesday, October 30 at 10PM ET/PT.
"2018 has been the most beautiful year for us," the reality TV couple additionally toldPeople. "Not only have we found each other after all this time, but fallen so deeply in love."
Danielle and Bobby added, "And now, we are beyond blessed to announce that we will be growing our family!"
Danielle, a software sale account executive, and Bobby, a construction project manager, tied the knot without even knowing each other's first names.
While most couples on Married at First Sight fight and attempt to work through major issues every season after marrying total strangers, Danielle and Bobby seamlessly settled into their new life together.
Not only did the pair avoid conflict entirely, but both individuals rated their partners a "Perfect 10" halfway through the extreme eight-week experiment, and their connection only grew stronger and deeper from there.
When it became time to choose whether to remain married or file for divorce on "Decision Day," Danielle and Bobby promised each other "forever," and Bobby sealed the deal by getting down on one knee and offering his wife a beautiful diamond engagement ring.
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"Decision Day" marked the first time Danielle said, "I love you," to Bobby, who had professed his love on numerous occasions beforehand.
The only slight point of contention between the pair boiled down to Danielle wanting to be a working mother once they welcome a child into the world. Bobby's preference, however, is to have Danielle stay home considering his sister, mother and grandmother were all stay-at-home moms.
"Best case scenario, Danielle wants to be a stay-at-home mom," Bobby told host Jamie Otis on a recent broadcast of Married at First Sight: Unfiltered on Lifetime.
"I think it could be healthy for the kid, but ultimately, whatever Danielle is happy with being, whatever is best for our family, and for Danielle and I and our child, is what it's going to be."
Bobby elaborated on Unfiltered: "Danielle is a really hard worker. She's got a great career... and if she chooses to pursue that, then more power to her. I'm not somebody who is just going to make her stay home with the kids. I mean, that's not what kind of life [I want]."
News of Danielle's pregnancy comes just hours before Married at First Sight's reunion special is set to air on Lifetime and provide fans with an update on each Season 7 couple at 9PM ET/PT.