Editing Jack Antonoff (section)

==Early Life and Background==

Antonoff was born and raised in Bergenfield and later Short Hills, New Jersey, into a Jewish family. His childhood was marked by early musical obsession and by personal tragedy: his younger sister Sarah died of brain cancer in 1997 when he was thirteen, an experience of grief and loss that has profoundly informed the emotional tenor of his songwriting and production throughout his career. He has spoken about her in numerous interviews, and her memory surfaces explicitly and implicitly across his work with Bleachers.

He attended the Ranney School in Tinton Falls, New Jersey, where he played in bands from an early age, and later studied at the Clive Davis Institute of Recorded Music at New York University — an institution that has produced a notable cluster of contemporary pop figures. His immersion in New York's indie rock and pop scene during his college years shaped both his musical aesthetic and his professional network.