The American Idol alum is in talks to appear in a multi-episode arc on Glee's upcoming fourth season, reports TV Line.
It isn't clear what role the 16-year-old singer would portray, but she is expected to join the cast midway through the first half of the season.
Sanchez competed during Idol's recent 11th run, where she came second to Phillip Phillips.
The young singer, who is known for her big voice, recently insisted that she is not the next Celine Dion.
"[Jimmy Iovine] said I can't be singing what I put on my album. I have to be singing competition songs, because we're on American Idol," she explained. "And I think that's what messed me up.
"I was paying attention to that way too much. I do sing ballads but I'm not a balladeer. I'm not the next Celine Dion."
Watch Jessica Sanchez perform 'My All' on American Idol below: