Jonathan Lee Miller is an English actor. He achieved early success for his portrayal of Simon "Sick Boy" Williamson in the dark comedy-drama film Trainspotting (1996) and as Dade Murphy in Hackers (1995) before earning further critical recognition for his performances in Afterglow (1997), Mansfield Park (1999), Mindhunters (2004),The Flying Scotsman (2006), Endgame (2009), and T2 Trainspotting (2017). For The Flying Scotsman he received a London Film Critics' Circle nomination for Actor of the Year. He was also part of the principal cast in the films Melinda and Melinda (2004), Dark Shadows (2012), and Byzantium (2013). He has appeared in several theatrical productions, most notably After Miss Julie and Frankenstein, the latter of which earned him an Olivier Award for Best Actor.

Trainspotting is a 1996 British black comedy-drama film directed by Danny Boyle and starring Ewan McGregor, Ewen Bremner, Jonny Lee Miller, Kevin McKidd, Robert Carlyle, and Kelly Macdonald in her film debut. Based on the 1993 novel of the same title by Irvine Welsh, the film was released in the United Kingdom on 23 February 1996.