"That's All Right" is a song written and originally performed by the American blues singer Arthur Crudup and recorded in 1946. "That's All Right" is best known as the debut single recorded and released by Elvis Presley. Presley's version was recorded on July 5, 1954, and released on July 19, 1954, with "Blue Moon of Kentucky" as the B-side. It was ranked number 113 on the 2010 Rolling Stone magazine list of the "500 Greatest Songs of All Time". Several critics have cited Presley's version as a candidate for the first rock and roll record.

Source: Wikipedia