This £70 dress is selling like hot cakes

If you're looking for your next party dress, then you can stop, because I've found it for you. You'll have to be quick though, it's selling extremely fast after being shared several times by influencers on Instagram.

It's easy to see the appeal: it's just the right side of sexy with its side slit and cut-out details, and bang on trend for SS22 - revealing details were all over the catwalk at fashion weeks, from Jacquemus to Jonathan Simkhai.

Then there's the attractive price point, it's only £69.99 at high-street chain Mango, plus it's a flattering midi length, making it a little more versatile in terms of which events you want to wear it to. In other words, it's great for wedding season.

Side slit dress - £69.99 at Mango

Side slit dress - £69.99 at Mango
This dress is an online exclusive only, so you won't be able to get your hands on it in store. It's part of the Committed collection, meaning products that have been produced using sustainable fibres or processes, reducing their environmental impact.

Fashion journalist and author Katherine Ormerod gave her followers a heads up on her Instagram stories, taking a break from her New York Fashion Week content.

At the time it hadn't even launched yet, and she was ready to add it to her basket. Just a few hours later, it went live, and lo and behold, it's already sold out in one size, and has low stock in others.

So if you want a bit of the action, it's now or never.

Penny Goldstone

Penny Goldstone is the Digital Fashion Editor at Marie Claire, covering everything from catwalk trends to royal fashion and the latest high street and Instagram must-haves.

Penny grew up in France and studied languages and law at the Sorbonne Nouvelle University in Paris before moving to the UK for her MA in multimedia journalism at Bournemouth University. She moved to the UK permanently and has never looked back (though she does go back regularly to stock up on cheese and wine).

Although she's always loved fashion - she used to create scrapbooks of her favourite trends and looks, including Sienna Miller and Kate Moss' boho phase - her first job was at, sourcing the best deals for everything from restaurants to designer sales.

However she quit after two years to follow her true passion, fashion journalism, and after many years of internships and freelance stints at magazines including Red, Cosmopolitan, Stylist and Good Housekeeping, landed her dream job as the Digital Fashion Editor at Marie Claire UK.

Her favourite part of the job is discovering new brands and meeting designers, and travelling the world to attend events and fashion shows. Seeing her first Chanel runway IRL at Paris Fashion Week was a true pinch-me moment.