American composer wrote oh what a beautiful morning and never walk alone?

The correct answer is Richard Rodgers. Richard Rodgers was an American composer who wrote the music for many Broadway musicals, including Oklahoma!, Carousel, South Pacific, and The Sound of Music. He also wrote the music for the films State Fair, Babes in Arms, and The King and I. Rodgers' songs include "Oh, What a Beautiful Mornin'", "People Will Say We're in Love", "Some Enchanted Evening", and "Climb Ev'ry Mountain".