Former TOWIE star Joey shared the news with fans via Twitter on Monday night (4 April).
I will miss you forever my beautiful little cat Prince ❤️ R.I.P ❤️ love you always x pic.twitter.com/FIy4tyaE53— Joey Essex (@JoeyEssex_) April 4, 2016
He wrote: "I will miss you forever my beautiful little cat Prince ❤️ R.I.P ❤️ love you always x."
Joey's sister Frankie also wrote a message on Instagram, saying: "RIP PRINCE @joeyessex90 and our Tracey who loved him very much too X @fuseyofficial #princeessex."
Joey has yet to confirm Prince's cause of death, but according to The Sun, Prince was run over in Joey's home town of Chigwell.
News of Prince's death comes after Joey revealed his cat had gone missing at the end of last week.
He tweeted last Friday (1 April): "My cat @PrinceEssex has got lost again or stolen. I have been looking for him all morning. Please help find him."
Prince had also gone missing in April last year, but he was eventually found eight hours later in a BT cupboard on the ground floor of the flats where he was staying.
Prince, who was a rare Bengal breed, was popular in own right with more than 23,000 Twitter followers. The cat also won the UK Favourite Celebrity Animal prize at the Nickelodeon Kids' Choice Awards last year.