Dressed in silver dress, the 32-year-old and her beau were giddy as they popped a giant black balloon to figure out who will be making them a family-of-three.
"It’s a girl. Thank you to all our amazing family and friends who witnessed this special moment with us!"
She added: "We had no idea of the gender until this moment, thanks for keeping it a secret."
The couple first became an item halfway through 2018.
She infamously found love with her Bachelor in Paradise partner Luke McLeod back in April - only to end things after he cheated her back in the outside world.