A video that was inspired by a comment on the couch of The Graham Norton Show on TV, can also lay claim to be the most thoroughly entertaining Taylor Swift video for a considerable time.

The seeds of the video are indeed almost certainly unique. Taylor Swift appeared on the BBC's top chatshow at the time of the release of new album Diary Of A Showgirl last October - together with actors Dromhall Gleeson, Cillian Murphy, Greta Lee and Jodie Turner-Smith, and singer-songwriter Lewis Capaldi. And all her fellow guests on the show are in the video - including Norton.

But spurred by a comment by Gleeson at the end of the show, its appropriate that he's the important casting decision that the tireless multi-tasking superstar made here. In the nominally 1980s-set comedy he and Taylor are everyday nerds, fixated on objects who do not love them back - until 'Opalite' magically brings them together. 

Taylor Swift has written on Instagram: "When we were all talking during the broadcast, Domhnall made a light hearted joke about wanting to be in one of my music videos. I was instantly struck with an *idea*.

"And so a week later, he received an email script I'd written for the Opalite video, where he was playing the starring role. I had this thought that it would be wild if all of our fellow guests on the Graham Norton show that night, including Graham himself, could be a part of it too."

Like all of her recent videos, the biggest pop star in the world is the director of this one. It's definitely one of her best efforts. The Opalite device - a spray that answers your dreams - is a bit heavy-handed, but the casting of Dromhall Gleeson as her love interest is a real winner. They have chemistry - and the various cameos of the rest of the Norton guests is undoubtedly a nice touch.

And Taylor seals the deal at the end with a lovely dance with Dromhall in coordinated tracksuits on stage at The Mildmay Club in Stoke Newington. Their unimpressed audience looks like it was cast from longest serving members of this active working men's club. Hand-picked by Taylor herself? Well, she does everything else...