The sisters, both animal lovers have appropriately named the feline as Soho.
The Hilton sisters found the cat at the beach house during the lunch hosted by fashion designer Diane von Furstenberg and decided to take the cat at their suite at the Fontainebleau Hotel, reported Contactmusic.
According to reports, the feline was then flown back to New York on the Jordache private jet with Nicky and rapper Kanye West.
Paris reportedly has 20 rescued rabbits, 17 dogs, two cats, three ferrets, two monkeys, a baby possum, a goat and a micro pig.
'Soho' was earlier in the news after actress Demi Moore took it to the exclusive Chanel dinner where it was fed expensive food.