MTV says Ashley Sawyer, who appeared in a 2013 episode of the network's reality show Catfish, has died at 23.
MTV News reports Ashley died over the weekend in Alabama. The cause of death is not known.
Catfish is a series about online scams.
The episode that featured Ashley shows her meeting a long-time digital companion, Michael Fortunato, in person.
The pair used altered images of themselves after striking up a conversation in an online chatroom.
MTV News reports Michael died at 26 from a pulmonary embolism one month after the episode aired.
In a recent follow-up episode, MTV says Ashley revealed she had struggled with addiction.
Catfish host Max Joseph has tweeted his condolences, calling Ashley "sweet and kind".