"Jellicle Cats" are fictional characters from the musical Cats, created by Andrew Lloyd Webber. They are a group of cats who gather for the annual Jellicle Ball, where one cat is chosen to ascend to the Heaviside Layer and be reborn. Each Jellicle Cat has a unique personality and story, showcasing the diversity of feline traits. The term "Jellicle" is derived from the poem "The Song of the Jellicles" in T.S. Eliot's collection Old Possum's Book of Practical Cats. The Jellicle Cats embody themes of identity, community, and the cycle of life, making them memorable characters in the world of musical theater.