We received confirmation earlier this year that Elton John would both star in and perform the song for the famous advert this Christmas, with insiders revealing it would tell the story of the star's life.
John Lewis's highly-anticipated 2018 Christmas advertising campaign, "The Boy & The Piano", launches today (15 November) and is the story of how one particular gift inspired and influenced the course of a little boy's life.
John Lewis" flagship store on London's Oxford Street also changed its name to just "John', and shoppers were convinced they had sussed the ad out ahead of its release.
John Lewis has unveiled its festive advert for 2018, and they've gone for a different style than in previous years.
Called The Boy in the Piano, it begins with the musician sat playing the opening bars of Your Song before it goes back in time to show his career and then his childhood, when he was given his grandmother's piano.
John Lewis addressed speculation about the cost of this year's ad, describing reports that it had paid Sir Elton £5 million as "wildly inaccurate".
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The reaction to the ad have been mixed.
The new John Lewis Christmas advert illustrates one man's lifelong love affair with the piano - and our cockles are truly warmed.
Featuring the singer's "Your Song", 2018's John Lewis Chrsitmas ad takes viewers through his glittering career, centring on Sir Reginald's greatest gift of all: his piano.
But the message we ultimately take away from this ad is that the joy of playing a musical instrument isn't just a Christmas gimmick - it will stay with you for life. A portion of Elton John's undisclosed fee has been donated to the Elton John Charitable Trust.
Last year's John Lewis Christmas ad focused on the tale of Moz the Monster who lived under the bed of seven-year-old boy Joe.