Based on the young-adult mystery novel by Jay Asher, Gomez is an executive producer on the show about a teenage girl who leaves behind cassette tapes explaining her suicide.
The actress-turned-singer teamed up with her mother, Mandy Teefey, to bring the series to screen.
Gomez posted a trailer for the show on Instagram to announce its March 31 premiere date.
On Thursday, she shared a selfie explaining how the series came about.