Larry is a cat who has served as Chief Mouser to the Cabinet Office of the United Kingdom at 10 Downing Street since 2011. He is a brown-and-white tabby, believed to have been born in January 2007. By July 2016, when Theresa May became prime minister, he had developed a reputation of being "violent" in his interactions with other local mousers, especially the Foreign Office's much younger cat Palmerston. His Prime Minister's are David Cameron and Boris Johnson. And his monarch is Elizabeth II.