"Disco Pigs" is a 2001 Irish coming-of-age romantic crime film directed by Kirsten Sheridan and written by Enda Walsh, based on his 1996 play of the same name. Cillian Murphy stars as Pig, the volatile teenager who develops romantic feelings for Runt (Elaine Cassidy), his lifelong friend. As their relationship implodes, Pig's jealousy becomes increasingly aggressive, threatening to destroy their delicate world. The film follows the intense and intimate relationship between Pig and Runt as they navigate their 17th birthday and the consequences of their actions.