Kanye West has unveiled a new song featuring Sir Paul McCartney.

The US rapper released the tune 'Only One' to celebrate the arrival of 2015.

The track, which pivots on keyboard work, appears to be to be written in dedication to West's child North.

The rapper posted the track's lyrics on his official website alongside a photo of himself with his child.

'Only One' is available to buy in the US on iTunes.

The song features lyrics such as 'Hello my only one, just like the morning sun/You'll keep on rising till the sky knows your name'.

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Listen to West's 'Only One' below: