H&M will work with Lanvin on a new collection of clothing, despite the brand's artistic director Alber Elbaz saying he would never do such a collaboration.
Lanvin are to be the next H&M collaborators.
The Swedish high street brand - which has previously collaborated with Stella Mccartney, Madonna and Karl Lagerfeld on cheaper rangers - has created a range of luxury clothes in conjunction with Lanvin's artistic director Alber Elbaz, who has previously said he would never work with a mass market store.
He said: "H&M approached us to collaborate, and to see if we could translate the dream we created at Lanvin to a wider audience, not just a dress for less.
"I have said in the past that I would never do a mass-market collection, but what intrigued me was the idea of H&M going luxury rather than Lanvin going public.
"This has been an exceptional exercise, where two companies at opposite poles can work together because we share the same philosophy of bringing joy and beauty to men and women around the world."
H&M's creative advisor Margareta van den Bosch added the brand was "thrilled" about the collection.
She said: "We are thrilled about Lanvin's collection for H&M, it is such an exciting moment. Lanvin will bring to H&M a luxurious French tradition that is also modern and playful. It is very much a Lanvin collection, using their cut and tailoring, with lots of focus on form and details for both women and men."
The range will hit stories on November 23.