Incendiary is a 2008 British drama film written and directed by Sharon Maguire. Based on the 2005 novel Incendiary by Chris Cleave, it stars Michelle Williams as a woman who loses her husband and young son in a terrorist attack at a football match. Ewan McGregor and Matthew Macfadyen co-star. Incendiary premiered at the Sundance Film Festival on 20 January 2008. Upon its release in UK theatres on 24 October 2008, it received mostly negative reviews from critics.