Even 20 years after its release, Mean Girls remains one of the most iconic, re-watched and endlessly quoted 'chick flicks' of all time. Can you even call yourself a real Noughties baby if you don't wear pink on Wednesdays, feel personally victimised by Regina George and still think that 'fetch' can happen?

The film also brought us the wonder that is Amanda Seyfried, who played the ditzy and hilarious Karen in what was the actor's first major film role – and ultimately set her career on the course to super-stardom.

But Seyfried has now revealed in a recent interview that her breakout Mean Girls role was almost given to someone else entirely – and it was none other than Gossip Girl star Blake Lively.

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Speaking with Vanity Fair, the 37-year-old actress revealed that she had originally auditioned for the part of Regina George, which ultimately went to Rachel McAdams. Recalling the experience, Seyfried said: 'I'd flown out to LA for the first time with my mother. It was very exciting. I met Lacey Chabert [who plays Gretchen] for the first time and Lindsay Lohan was in the room and Blake Lively was playing Karen, and then I was Regina.'

blake lively met gala
Mike Coppola//Getty Images

At some point afterwards, however, the casting directors changed their minds. 'I flew home and they were like..."We think you're more correct for Karen,"' revealed Seyfried. 'So I was like, "Oh god, OK, sure."'

The rest, as they say, is history. And we'll forever be grateful to Seyfried for inspiring in us a strange desire to clutch our breasts when it's raining...

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Clementina Jackson
Site Fashion Editor

Clementina Jackson is Acting Site Fashion Editor at ELLE UK, working across news and features, trends, e-commerce and SEO. She was previously Fashion Editor at Cosmopolitan and Women’s Health, and Acting Digital Fashion Editor at ELLE UK, where she was named as a PPA 30 Under 30 award winner for her work on size inclusivity. An experienced fashion, travel and luxury lifestyle journalist, Clementina has also written for Harper’s Bazaar, Vanity Fair, Condé Nast Traveller, Tatler, Red and Italy Segreta.