The Acid House is a 1998 Scottish film adaptation of Irvine Welsh's short story collection The Acid House directed by Paul McGuigan. Welsh himself wrote the screenplay and appears as a minor character in the film. All three sections are independent, but are linked by the setting of Edinburgh and the reappearance of incidental characters, in particular Maurice Roëves, who appears variously as an inebriated wedding guest, a figure in a dream, and a pub patron. All three of his parts symbolise a human manifestation of God.

Irvine Welsh is a Scottish novelist and short story writer. His 1993 novel Trainspotting was made into a film of the same name. He has also written plays and screenplays, and directed several short films.