Get To Know The Girls Of 'Teen Mom 3' [Photos]

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Alex, Mackenzie, Katie and Briana at the "Teen Mom 3 After Show" shoot in Brooklyn, New York.

The casts of "Teen Mom" and "Teen Mom 2" are no longer kids, that's for sure. They're getting married, expanding their families and starting careers, but the new crop of young mothers about to be featured on "Teen Mom 3" are just beginning their journeys into the scary, grown-up world of parenthood.

Like the girls that preceded them, Katie, Alex, Mackenzie and Briana all come from different walks of life, but -- as is the case with most teenagers -- they all share a love of social media. In an effort to get you re-acquainted with the four "16 & Pregnant" alum, we've combed their accounts to give you some insight into their daily lives as young parents. Check out their Twitter pics below, and be on the lookout for news about "Teen Mom 3," premiering this summer!

Learn about each new mom below:

Nap time for Mackenzie and Gannon.

Mackenzie

An all-American girl from Oklahoma, Mackenzie was a high school cheerleading star before she gave birth to her son, Gannon. She's a big fan of MTV's "Girl Code," but an even bigger fan of bull-riding cowboys. For a refresher on Mackenzie's road to motherhood, check out her "16 and Pregnant" episode.

Kisses for Baby Molli from her loving mom, Katie.

Katie

Katie's always been a performer -- a recent Throwback Thursday post showed her putting on stage makeup as a kid -- and according to her Twitter, she's now in a music video! But theatrics aside, Katie's No. 1 priority is spending time with her daughter, Molli. Catch her "16 and Pregnant" episode again for a reminder of her story.

Briana and her beautiful birthday girl, Nova.

Briana

One look at the Florida girl's Twitter account and you'll see just how dedicated she is to raising her little Nova. "Still hasn't hit me that I birthed such a beautiful, healthy, intelligent baby girl," she recently tweeted. And if Briana's Instagram is any indication, "Teen Mom 2"'s Aubree will soon have a friend to swap fashion tips with. For more on Briana, watch her "16 and Pregnant" episode.

Alex and her mini-me, Arabella, put their heads together.

Alex

Much like Mackenzie, Alex's passions lie in movement. The Pennsylvania native often Instagrams pics of her dancing skills, but her Twitter is rife with snippets about her daily life, mostly centered on being the best mom she can be to her daughter, Arabella. For more on Alex, check out her "16 and Pregnant" episode.