28 Days Later is a 2002 British post-apocalyptic horror film directed by Danny Boyle and written by Alex Garland. It stars Cillian Murphy as a bicycle courier who awakens from a coma to discover the accidental release of a highly contagious, aggression-inducing virus has caused the breakdown of society. Naomie Harris, Christopher Eccleston, Megan Burns, and Brendan Gleeson appear in supporting roles.

Cillian Murphy is an Irish actor. He made his professional debut in Enda Walsh's 1996 play Disco Pigs, a role he later reprised in the 2001 screen adaptation. His early film credits include the horror film 28 Days Later (2002), the dark comedy Intermission (2003), the thriller Red Eye (2005), the Irish war drama The Wind That Shakes the Barley (2006), and the science fiction thriller Sunshine (2007). He played a transgender Irish woman in the comedy-drama Breakfast on Pluto (2005), which earned him a Golden Globe Award nomination.