The official song, also called 'Skyfall', was scheduled to premiere on the singer's website on October 5, which has been declared Global James Bond Day.
However, fans managed to hear a preview of the tune on Tuesday after it emerged on free streaming site Soundcloud and YouTube, reported Daily Express.
Paul Epworth, who wrote the track with Adele, took to Twitter to urge fans to wait until Friday to hear the proper version.
"I hear a short excerpt of Skyfall leaked... I can't wait for everyone to hear the whole thing because Adele's performance is jaw dropping," he tweeted.
Adele recorded 'Skyfall' here at famed Abbey Road Studios accompanied by a 77-piece orchestra.
