Adele unveils Skyfall theme song

Adele's theme for the new Bond film 'Skyfall' has finally arrived.

Listen to it here.

Though a snippet was leaked on Tuesday, it was officially unveiled in its entirety at the apt time of 00.07.

It has been co-written by Paul Epworth, who worked with Adele on '21' and has produced the likes of Florence & The Machine.

[Related story: Adele confirms Skyfall song]

Recorded with a 77-piece orchestra at Abbey Road Studios, the sprawling track channels the classic Bond themes of the late John Barry.

Fans appear to love it, posting messages of support online, but how has it gone down among rock critics?

Though the New York Daily News admitted she graces the theme with the 'biggest voice since Shirley Bassey', Jim Farber said: “Ultimately, it does a far better job at conforming to the form's cliches [than] it does pushing it to any thrilling new heights.”

 The Daily Telegraph's Neil McCormick seems to agree, saying: “It is, in fact, so slavish in its adherence to the template established in the Sixties that it’s a kind of a relief when the answer backing vocals kick in on the second chorus, lending it at least a hint of Adele’s own style.

“This song is fine, it will sound great in a cinema with CGI women and bullets floating across the opening credits, but it inevitably pales in comparison to the songs to which it pays homage.”

Popcrush, however, says that Adele was 'born to sing this song', adding: “The song escalates its tension during the last 30 seconds, as the instruments build and thicken. It’s as though she spends the entire song building up to that moment, to sing that massive note during the crescendo.

“It’s wholly satisfying and worth the wait. When she sings 'Let the sky fall / When it crumbles / We will stand tall / Face it all together,' we’re apt to take the plunge with her.

'Skyfall' is released in cinemas on 26 October.