Al compás de tu mentira (English: To the Compass of Your Lie) is a 1950 Argentine musical film of the classical era of Argentine cinema, directed by Héctor Canziani. The film was adapted from Oscar Wilde's 1895 play The Importance of Being Earnest by Abel Santacruz. The film starred Francisco Álvarez and Pedro Quartucci.

The film is based on tango dancing, an integral part of the culture of Buenos Aires.