"As Time Goes By" is a song written by Herman Hupfeld for the 1931 Broadway musical Everybody's Welcome. Frances Williams sang the song in the original show.
Albert Einstein is mentioned in the song, dealing with his theory.
It was recorded by several artists in 1931 including Rudy Vallee. The song was re-introduced in 1942 in the film Casablanca in which it was sung by Dooley Wilson. Wilson never released a single of the song because a musician's strike was ongoing at the time of the film's release. A re-issue of Rudy Vallee's 1931 recording became a major seller in that year.
The lyrics of the verse that contain the title phrase are: :A kiss is still a kiss, a sigh is just a sigh. :As time goes by.
