Authorities in Chester County say 23-year-old Valerie Fairman died Wednesday. The cause of death remains under investigation.
Police in Coatesville plan to release information on her death later Thursday.
The coroner says she was pronounced dead just before 5 p.m. Wednesday.
Fairman appeared in the second season of the show in 2009-2010 when she gave birth to a daughter.
MTV officials say they are saddened by the news and extend their thoughts to her family.