Billie Eilish's theme for the new James Bond film is a dramatic, unsettling ballad that hints the plot will centre around the secret agent's betrayal.
The lyrics to No Time To Die reference lies and deceit, as Eilish sings: "You were never on my side."
The song was released at 00:00 GMT, at the same time as a new trailer for the film, starring Daniel Craig.
Eilish, who turned 18 in December, is the youngest singer ever to record a theme for the franchise.
Its release was highly anticipated at the end of a week that saw her performing to a worldwide TV audience at the Oscars.
No Time To Die opens with a haunting piano motif, with the star's voice weary as she sings, "I should have known I'd leave alone".
A familiar tremolo guitar ushers in the chorus, where the singer develops her theme: "I've fallen for a lie... Are you death or paradise?"
"Now you'll never see me cry," she concludes. "There's just no time to die."
The words seem to confirm a fan theory that Daniel Craig's final outing as Bond will see him double-crossed by Madeleine Swann (Lea Seydoux), his love interest from the previous film, Spectre.
Eilish wrote and produced the title song with her elder brother Finneas O'Connell late last year. Speaking at the Grammys in January, she said working on the franchise had always been one of their goals.
"Subconsciously and consciously, we've been trying to write a Bond theme for our whole lives," she told E! News.