Leah Messer has checked into rehab.
The news comes in the wake of reports that Messer and her husband of three years, Jeremy Calvert, are heading toward divorce. Previews from the new season of "Teen Mom 2" also show Messer dealing with rumors that she has used drugs and cheated on Calvert.
Messer, 23, has three children: twins Aliannah and Aleeah with her first husband, Corey Simms, and Adalynn with Calvert.
"Teen Mom 2" premieres Thursday, July 9 on MTV.