Teen Mom 3 star Mackenzie Douthit has revealed she's expecting a baby girl with husband Josh McKee.

"Find out what I'm having!" the 18-year-old reality TV star, who is already a mom to a two-year-old son named Gannon, said in a Saturday Vine video that ended with McKee cutting into a cake and finding pink frosting inside.

"Josh cannot stop smiling. He's always wanted a little princess to look after," Douthit tweeted shortly after the reveal. "Now Josh is calling all his rodeo friends to tell them, #cutedadtweet."

The couple apparently celebrated the news surrounded by family and friends.

Douthit and McKee got married last month at The Barn at Timber in Pittsburg, KS, Us Weekly reported. They wed in front of 200 guests and reportedly celebrated their union with a big country-themed reception.   

The pair of high school sweethearts revealed in January they had gotten engaged for a second time after splitting up in October 2012.

Teen Mom 3 premiered August 26 and currently airs on Monday nights at 10PM ET/PT on MTV. In addition to Douthit, the series also stars young mothers Katie Yeager, Briana DeJesus and Alex Sekella.