"Teen Mom 2" star Jenelle Evans is pregnant ... and a "changed" woman.

The 21-year-old reality TV star and boyfriend Nathan Griffith (left) are expecting their first child together, and according to E!, it was a "planned" pregnancy.

Both Evans and Griffith each have one kid from previous relationships. Jenelle's mom has custody of her 4-year-old son Jace, while Nathan's ex-wife's parents have guardianship of his 2-year-old daughter Emery.

Complicating matters even more: Jenelle is still married to her ex Courtland Rogers, who is currently in jail. Rogers plead guilty in April, after Evans accused him of assaulting her and their unborn child . She later miscarried.

While Jenelle has had a very troubled history on the MTV show, she now insists she's changed for the better, posting earlier this morning:

According to a new interview with MTV, Evans says she's been sober since November 2012. 

"We just want a child of our own that we can raise together as a family, and we want a stable relationship for Jace and his daughter,” she said. “We just want to settle down.”

"Now I’m in a stable relationship and I have my own place, my own car, a job…I can pay my bills. I’m just happy with my life right now," she adds. "I understand if they judge me now, but they won’t judge me soon."

We'll see what happens when "Teen Mom 2" returns for a fifth season in 2014.

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