In 1942, Rodgers teamed up with Oscar Hammerstein II. They made the most successful partnership in American musical theatre history. Their first musical was the hit "Oklahoma!". The team went on to create four more of the most popular musicals to date: "Carousel" (1945), "South Pacific", "The King and I" (1951), and "The Sound of Music" (1959). All four were made into popular films.