"Wait 'Till the Sun Shines, Nellie" is a 1905 popular song with music written by Harry Von Tilzer and lyrics by Andrew B.

[1][2][3] "Wait 'Till the Sun Shines, Nellie" has been recorded many times and is now considered a pop standard.

[4] On the August 15, 1929, strip of Thimble Theatre, Castor Oyl sings the song after he loses $10 million.

In a long-standing tradition, floor traders at the New York Stock Exchange sing this song on the last trading day of every year and on Christmas Eve.

A sample of the song, sung a cappella by Tom Bromley, an elderly First World War veteran, appears on the Roger Waters 1992 album Amused to Death at the end of the track "What God Wants (Part III)".