Elvis' 40 Greatest is a compilation album by Elvis Presley. It was released in 1974 and was the UK's biggest-selling album over the Christmas period of that year, but along with all albums on K-tel, Ronco and Arcade, it was ineligible for the UK Albums Chart until 1975 because it was felt that heavy TV advertising and low pricing distorted the charts. It finally reached number one on the UK Albums Chart in 1977, and became the 10th best-selling album of the 1970s in the UK.