John Keats was a famous English Romantic poet born in 1795 in London. He came from a working-class family and lost both parents at a young age. Keats devoted himself entirely to poetry and found inspiration in nature, Greek classics, and other poets. Some of his most famous works include the poems "Ode on a Grecian Urn", "Ode to a Nightingale", and "Ode to Autumn". Keats tragically died young at age 25, but his poems are still greatly admired for their beauty and exploration of themes like mortality.