Who wrote the poems on which the musical "Cats" was based?

Thomas Stearns Eliot, OM (26 September 1888 – 4 January 1965) was a British essayist, publisher, playwright, literary and social critic, and "one of the twentieth century's major poets". He moved from his native United States to England in 1914 at the age of 25, settling, working, and marrying there. He eventually became a British subject in 1927 at the age of 39, renouncing his American citizenship.

Eliot attracted widespread attention for his poem "The Love Song of J. Alfred Prufrock" (1915), which was seen as a masterpiece of the Modernist movement. It was followed by some of the best-known poems in the English language, including "The Waste Land" (1922), "The Hollow Men" (1925), "Ash Wednesday" (1930), and "Four Quartets" (1943).

In 1939, Eliot published a book of light verse, "Old Possum's Book of Practical Cats" ("Old Possum" was Ezra Pound's nickname for him). This first edition had an illustration of the author on the cover. In 1954, the composer Alan Rawsthorne set six of the poems for speaker and orchestra in a work titled "Practical Cats". After Eliot's death, the book was adapted as the basis of the musical "Cats" by Andrew Lloyd Webber, first produced in London's West End in 1981 and opening on Broadway the following year.