A new season of "Teen Mom" is back on MTV, but the faces are familiar favorites.

ETonline caught up with original cast members Amber Portwood, Farrah Abraham, and Catelynn Lowell to discuss returning to the reality show centered on young moms and how their lives have changed since they were "16 and Pregnant."

NEWS: 'Teen Mom' Maci Bookout Involved in Terrifying Car Accident

"It's gonna be exciting," Portwood said. "The show is completely new. Everything is brand new - our lives, everything."

Farrah Abraham returns to the show this season after several tumultuous years in the spotlight, appearing in a season of VH1’s "Couples Therapy," as well as a series of pornographic films.

"I'm just living my life and I’m being the best mother that I can and showing that on 'Teen Mom' because that's what that show is about," she told ETonline’s Katie Krause.

Abraham said that she watches the show now as a parenting tool, hoping to learn from her experiences as well as the lives of her fellow cast member moms.

"Looking back at past seasons from '16 and Pregnant,' 'Teen Mom,' and to now, I’ve realized how to become a better, loving, and more responsible mother," she admits.

NEWS: 'Teen Mom 2' Star Jenelle Evans Is Engaged

While Lowell jokes that the thing she takes away from watching old episodes is to "always wear makeup," Portwood agrees that the ability to reflect on her early years of parenting through the show has been a unique and beneficial experience.

"I think looking back is a great way to reflect and not a lot of people get to to do that as parents, you know?" she observed.

The documentation of daughter Leah’s early years was especially meaningful for Portwood, who spent 17 months away from her little girl while she was in prison after being arrested for drug possession and reportedly attempting suicide in 2011. Now sober, Portwood says the new season of the show is a new beginning for her and her family.

"It's just a brand new life for me," she told ETonline. "I'm excited."

"Teen Mom" airs Mondays on MTV.