Irvine Welsh's Ecstasy is a 2011 Canadian film adaptation of the short story "The Undefeated" from the best-selling book Ecstasy by Irvine Welsh. Directed by Rob Heydon, the film stars Adam Sinclair as Lloyd Buist, a drug user who smuggles ecstasy from Amsterdam. Kristin Kreuk plays his love interest, Heather Thompson.