Nelson began his entertainment career in 1949 playing himself in the radio sitcom series, The Adventures of Ozzie and Harriet. In 1952, he appeared in his first feature film, Here Come the Nelsons. In 1957, he recorded his first single, debuted as a singer on the television version of the sitcom, and released the #1 album entitled Ricky. In 1958, Nelson released his first #1 single, "Poor Little Fool", and in 1959 received a Golden Globe nomination for "Most Promising Male Newcomer" after starring in Rio Bravo. A few films followed, and when the television series was cancelled in 1966, Nelson made occasional appearances as a guest star on various television programs.