There’s a funny feeling in the air. You’re choosing colour-blocking over head-to-toe black. You’ve caught people smiling. And the other day the most bewildering sensation came over you and you skipped out of the house without tights on. Hello spring.

And the dawning of spring coincides with another landmark event: the arrival of Baz Luhrmann’s long-awaited Great Gatsby. ELLE has been dizzy with Gatsby fever for months – we worry we might spontaneously combust when the film actually lands – so we’re loving any opportunity to indulge in some flirty flapper fun.

To celebrate the film’s arrival and with it the arrival of a season’s worth of 20s-themed parties, cocktails and outfits, iconic London department store Harrods is running a one-off online pop-up shop today between 4pm and midnight.

It’s not so much a pop-up shop as a pop-up party: as well as flash sales, you can win prizes including a weekend trip to New York, a cocktail masterclass, tickets to an exclusive preview of The Great Gatsby, and the chance to win a 1920s-inspired Erte gown, by ALICE by Alice Temperley, which will see you through all the Long Island garden parties of the season.

To score an invite, simply visit harrods.com/OpeningNight between 4pm and midnight today.

All that’s left is to mix a Gin Rickey or three, whip out your Charleston and get ready for a long Gatsby summer.