Friedrich Wilhelm Ernst Busch was a German singer and actor.

The Threepenny Opera is a German "play with music" by Bertolt Brecht, adapted from a translation by Elisabeth Hauptmann of John Gay's 18th-century English ballad opera, The Beggar's Opera, and four ballads by François Villon, with music by Kurt Weill. Although there is debate as to how much, if any, contribution Hauptmann might have made to the text, Brecht is usually listed as sole author.