Carly Waddell and Evan Bass have announced the sex of their baby.

The Bachelor in Paradise couple, who got engaged on Season 3 last summer and got married on this summer's edition, revealed on Saturday, August 19 they are expecting a baby girl.

This is huge news considering Evan is already a father to three boys from a previous relationship -- Ensley, Nathan and Liam.

Carly, 31, shared an Instagram photo of herself in which she was making a heart sign with her hands on her baby bump and Evan and his sons were holding up pink items, such as rock candy and a giant paper flower.

Carly captioned the image: "This is our professional Gender Reveal photo! IT'S A GIRL!!!! I'm not the only girl anymore! Woo Hoo!!!"

Evan also shared a video on Instagram on Sunday that showed one of his sons hitting a pinata to reveal the baby's gender. Once pink streamers were released from the pinata, everyone began cheerling loudly.

"We are pleased to announce the release of our baby girl Bass in February 2018," Evan wrote alongside the clip. "My book, 'Raising Girls and Where to Buy a Shotgun for her Prom' will be released shortly thereafter followed up by my fashion blog YouTube interactive. ALSO, WE ARE SO EXCITED."

Evan, 34, explained to Us Weekly before the gender reveal that his children were really hoping for a little sister.

"They really want it to be a girl. They've already got contingency plans if it's a boy too," Evan had said. "He's going to be the next Ronaldo if it's a boy. If it's a girl, we're going to protect her together. We're a family of boys, and Carly, and they want that little girl."

Carly and Evan announced they're expecting a little bundle of joy on August 6, but the couple discovered Carly is pregnant only a few days after tying the knot in June for a Bachelor in Paradise episode that aired last week.

"We were in Mexico and it was actually a few days after our wedding and it was a little Mexican town called Salulita. She was late. I was like, 'You're really funny. Let's go to a Mexican drug store and get a test.' We go into this drugstore and after she went and took the test and she comes out and was like, 'I don't know what that means. It's in Spanish,'" Evan recalled to Us.

"I had to Google and I was like, 'Oh, my God, you're pregnant.' We freaked out. It was extra special to find out down the street from where we got married, engaged, everything."

Evan has been joking around for weeks that he wants to name the baby Evan, regardless of whether it's a boy or girl, but Carly has not been onboard with the idea.