The announcement was teased over several days on Instagram, but fans guessed at the singer's identity thanks to her hairstyle.
In the series of black and white shots, you can see Ariana wearing a black cocktail dress, an homage to Audrey Hepburn, who of course wore that iconic Givenchy LBD in Breakfast at Tiffany's.
When she was finally revealed, you didn't see her face, just a simple swish of her ponytail, another nod to the Truman Capote film, which opens with Audrey staring at the famous jewellers' window display, from the back.
In a statement, the brand said, 'It is with great excitement that the House of Givenchy reveals its new face — a strong, independent woman of refreshing character and style: the multi-talented Ariana Grande.
'A modern muse and the voice of a generation, Ariana has emerged as one of the most influential forces in pop culture today. A Grammy award-winning performer, songwriter and singer, she naturally embodies the spirit of the Givenchy woman with impertinence, generosity and a lightning wit — all cloaked in a touch of mystery,' the statement continued.
Marie Claire Newsletter
Celebrity news, beauty, fashion advice, and fascinating features, delivered straight to your inbox!
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 MoneySavingExpert.com, 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.
Be the star gift giver this Christmas with a personalised piece of jewellery to make loved ones smile
If your list of loved ones is long and you’re stumped for ideas, there’s one gift that always keeps on giving – and that’s the perfect piece of jewellery.
By Anna-Louise Dearden
How to get tickets to see Eurovision 2024 live
Scandinavia is calling!
By Lauren Hughes
Emily Ratajkowski faces backlash for 'fatphobic' and 'tone deaf' photoshoot
People are calling for the model to apologise for the image
By Iris Goldsztajn