Bob was rescued by busker and Big Issue seller James Bowen in 2007 when he found him injured. Since then the pair have been inseparable, appearing first on the streets of London but then as the subjects of a series of books about their adventures.
The first and most popular book, A Street Cat Named Bob, has sold millions of copies worldwide and was turned into a movie of the same name, starring Luke Treadaway as James and Bob as himself.
Bob has hundreds of thousands of followers on social media and still makes public appearances.
You can buy copies of the book here