Amber Portwood is behind bars again ... this time, for five long years.
TMZ reports the Teen Mom checked into the Rockville Correctional Facility in Indiana this morning at approximately 7:45 a.m.
Amber is serving a five-year prison sentence, after reneging on a plea deal that would've let her off if she completed a rehab program.
""I felt like that wasn't the life I wanted to live, I felt like I'd rather do my time, and get it over with, and make the best out of the situation that's been handed to me," she told ABC News of her decision to go to prison.
"I'm going to take some classes, I'm going to get my GED, take as many programs as I can."
We hope Amber really does make the best of this terrible situation. And our thoughts and best wishes go to little Leah!