According to French newspaper Le Figaro, the German creative director of Chanel - who passed away on Tuesday at the age of 85 - could have his entire multi-million pound fortune handed over to his Birman feline under German law, providing she had been nominated as his "heir" through an association or foundation.
The late German designer's cat, who was the centre of his world, as Karl Lagerfeld used to say, is famous in her own right and she may even inherit a share of the estimated $273 million fortune left after the fashion icon's death.
Speaking to Numero magazine past year about leaving his vast fortune to Choupette, he said: "Among others, yes".
The eight-year-old cat has appeared in various commercials including those for a German vehicle firm and a Japanese cosmetic brand.
Choupette would sit "opposite" Lagerfeld during meals and is brushed "four times a day".More news: Kim or Trump? Hanoi barber offers leaders' hairdos for free
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Choupette - who the designer compared to the enigmatic star Greta Garbo - is something of a cult figure in the fashion world, with more than 170,000 followers on social media. As well as a book Choupette: The Private Life of a High-Flying Fashion Cat where she is pictured with top models. He asked for his "ashes to dispersed with those of my mother... and those of Choupette, if she dies before me".
Lagerfeld wished to be cremated, something he spoke to the magazine about.
A spokesperson from Karl's eponymous line, Karl Lagerfeld, told French news agency AFP that Karl's "wishes will be respected".
In the 2017 biography Jacques de Bascher, dandy de l'ombre, Karl revealed that he kept Jacques' ashes in a place that only he knew.