Three of the original Teen Moms pose for this promotional image. They are back for the OG season of the series.

We're on the MTV bus with Amber in this photo. It's a snapshot from an episode of Teen Mom OG.

Will it be a boy or a girl? Catelynn is holding a party and will make that reeal on this episode of Teen Mom OG.

Teen Mom is back! With its Original Girls! Hence the new name Teen Mom: OG!

These are the original Teen Moms. They got things started for MTV with this franchise.

Javi confronts Kailyn after Kail's mom babysits Lincoln while drunk on the conclusion of the Teen Mom 2 season 5 finale.

Leah breaks down in this photo from Teen Mom 2. She's talking to Dr. Drew about her custody battle.

The young women of Teen Mom 2 pose here for a promotional photo. We've followed their adventures on Season 5.

Leah worries as Corey takes her to court over custody of the kids on Teen Mom 2. "Wish You Were Here" is the 24th episode of the show's fifth season.

Jace helps his grandma set up for Jenelle's baby shower on Teen Mom 2.

Leah and Corey argue over why their child has missed therapy on Teen Mom 2. "Summer Daze; Summertime Sadness" is the 22nd episode of the show's fifth season.

Jenelle is upset over the way Barbara treats Jace on Teen Mom 2.