To-Night's the Night is a musical comedy composed by Paul Rubens, with lyrics by Percy Greenbank and Rubens, and a book adapted by Fred Thompson.

The musical was produced by George Grossmith, Jr. and Edward Laurillard and directed by Austen Hurgon.

It then was produced at the Gaiety Theatre in London, opening on April 18, 1915 and running for a very successful 460 performances.

Grossmith starred in the piece with Leslie Henson.

Grossmith told The New York Times that the musical was the first Gaiety Theatre Company production presented in New York before opening in London.