Choupette is known to fans across the globe for its account on the Instagram social media website, which shares photographs of the cat's luxurious life, and rumours about its two personal maids andpublicist.
Lagerfeld, the Chanel creative director, told The Cut, a fashion website, the cat was the "centre of the world" and his inspiration. But despite its commercial success, Choupette is not, he added, permitted to advertise foodstuffs, because she is "too sophisticated for that".
Choupette is the latest cover star of the American fashion magazine Lucky, for its "100+ Stylish Animals" issue. Lagerfeld, 81, said: "It's a miracle in the story. Choupette was not even given to me. Choupette belonged to a friend of mine who asked if my maid could take care of her for two weeks when he was away.
"When he came back, he was told that Choupette would not return to him.
"He got another cat who became fat, and Choupette became the most famous cat in the world, and the richest."
He added of Choupette's charms: "She had something unique."She is like a human being, but the good thing is that she's silent. You don't have to discuss it. She hates other animals and she hates children. She stays always with me and she has two personal maids.
"They play with her, they have to take care of her beautiful white hair, the beauty treatments for her eyes, and they entertain her. She is the centre of the world.
"If you saw her, you would understand. She is kind of Greta Garbo. There is something unforgettable about her, the way she moves, the way she plays.
"She's an inspiration for elegance. For attitude."