When We All Fall Asleep, Where Do We Go? (stylized in all caps) is the debut studio album by the American singer-songwriter Billie Eilish. It was released on March 29, 2019, by Darkroom and Interscope Records in the US and Polydor Records in the UK. Eilish, aged 17 at the time of release, largely wrote the album with her brother Finneas O'Connell, who produced it at his small bedroom studio in Highland Park, Los Angeles.