The Padlock is a two-act 'afterpiece' opera by Charles Dibdin. The text was by Isaac Bickerstaffe. It debuted in 1768 at the Drury Lane Theatre in London, England, as a companion piece to The Earl of Warwick. It partnered other plays before a run of six performances in tandem with "The Fatal Discovery" by John Home. "The Padlock" was a success, largely due to Dibdin's portrayal of Mungo, a blackface caricature of a black servant from the West Indies. The company took the production to the United States the next year, where a portrayal by Lewis Hallam, Jr. as Mungo met with even greater accolades. The libretto was first published in London in 1768 (?) and in Dublin in 1775.