Una Winifred Atwell (27 February or 27 April, 1910 or 1914 – 28 February 1983) was a Trinidad-born British pianist who enjoyed great popularity in Britain and other countries (including Australia) from the 1950s with a series of boogie-woogie and ragtime hits, selling over 20 million records. She was the first black person to have a number one hit in the UK Singles Chart, and still the only female instrumentalist to do so.