Nat King Cole was a legendary American singer, jazz pianist, and actor. He first came to prominence as a leading jazz pianist, forming the influential King Cole Trio which became a blueprint for small jazz ensembles. Cole's velvety-smooth baritone voice made him one of the most beloved and successful vocalists of the 20th century, with timeless hits like 'Unforgettable' and 'Mona Lisa'. His career broke significant racial barriers, and he became the first African American man to host an American network television series.