Billy Liar is a 1959 novel by Keith Waterhouse that was later adapted into a play, a film, a musical, and a TV series.

The semi-comical story is about William Fisher, a working-class 19-year-old living with his parents in the fictional town of Stradhoughton in Yorkshire. Bored by his job as a lowly clerk for an undertaker, Billy spends his time indulging in fantasies and dreams of life in the big city as a comedy writer.