Sadly, the original Grumpy cat – also known as Tardar Sauce – recently passed away but his immortal legacy is bound to live on. But on a brighter note, we may have a new Grumpy cat in town who will take the throne of the world’s angriest kitty. Louis, a 6-year-old Persian cat from Austin, Texas, has already been dubbed the new ‘Grumpy Cat’ by followers on his social media accounts.