The track, which Eilish previously revealed was a ballad and was written and performed by the 18-year-old, was released on various streaming platforms including Spotify and Apple Music.
It features classic elements of the most memorable Bond themes including a slow build; a dark, shivery theme; and dramatic orchestration.
Fans have already been comparing the theme both to Shirley Bassey’s “Diamonds Are Forever” and Adele’s “Skyfall”.
Lyrics include: “I’d should have known/ I’d leave alone/ Just goes to show/ That the blood you bleed/ Is just the blood you own” and “We were a pair/ But I saw you there/ Too much to bear/ You were my life, but life is far away from fair.”
Stream the track on Spotify here. No Time to Die is released in cinemas on 3 April.