"Unforgettable" is a popular song written by Irving Gordon. The song's original working title was "Uncomparable,” however, the music publishing company asked Gordon to change it to "Unforgettable.” The song was published in 1951.

Nathaniel Adams Coles, known professionally by his stage name Nat King Cole, was an American singer, jazz pianist, and actor. Cole's career as a jazz and pop vocalist started in the late 1930s and spanned almost three decades where he found success and recorded over 100 songs that became hits on the pop charts.