Holly Michelle Phillips (née Gilliam; born June 4, 1944) is an American singer, songwriter, and actress. She gained fame as a member of the 1960s group The Mamas & the Papas, and is the last surviving original member of the group.
Newcomer Katherine Langford plays the role of Hannah, a young woman who takes her own life. Two weeks after her tragic death, a classmate named Clay finds a mysterious box on his porch. Inside the box are recordings made by Hannah --- on whom Clay had a crush --- in which she explains the 13 reasons why she chose to commit suicide. If Clay decides to listen to the recordings, he will find out if and how he made the list. This intricate and heart-wrenching tale is told through Clay and Hannah's dual narratives.