Amber Portwood has revealed whether her second child is going to be a boy or girl.

The Teen Mom OG star, who is expecting a baby with her boyfriend Andrew Glennon, announced Friday on Twitter that she's having a baby boy.

"Little baby Glennon is on his way," Amber captioned an image of a Christmas ornament featuring a newborn holding a rabbit stuffed animal in a blue onesie and the words "It's a Boy" written on it.

Reports surfaced early last month that Amber, 27, is pregnant again and she's "really, really happy" about the upcoming addition to her family. Amber then confirmed the pregnancy news about one week later.

Amber is already mom to daughter Leah, 8, with ex-fiance Gary Shirley.

"When I first found out, I was a little scared," Amber told Us Weekly of Baby No. 2 in November.

"I just kind of sat down and thought about it and realized that it was a big step in my life and it was a good thing actually, and I was really happy within 30 minutes."

Amber and Andrew, a cinematographer, made their red carpet debut together in August 2017 at the MTV Video Music Awards in Los Angeles.

The pair reportedly met while Amber was filming Marriage Boot Camp with her latest ex-fiance, Matt Baier. Andrew apparently worked on the WE tv show and contacted the reality TV star once production on the series wrapped.

"After the initial shock," Amber continued of her pregnancy, "it was nothing but happy thoughts and just enjoying my time with my boyfriend. We're both very happy... Obviously it's non-traditional... But you know me, if I didn't do things the way I did, I wouldn't be me."

Amber also shared with Us that Andrew has been very supportive and "very adamant" about her living a healthy lifestyle while carrying their child.

"Andrew is very adamant on making sure that I'm eating nothing but fruits, veggies, meats and organic foods," Amber revealed.