Overnight is a 2003 American documentary film by Tony Montana and Mark Brian Smith. The film details several years in the life of filmmaker and musician Troy Duffy, the writer-director of The Boondock Saints (1999), and was filmed at his request.

Duffy is presented as a victim of his own ego: as the documentary progresses and his fortunes fade during the troubled production and distribution of The Boondock Saints, he becomes increasingly abusive to his friends, relatives and business partners. According to co-director Montana, "Troy seemed to revel in the attention of Hollywood's lights and our cameras. Only three times during the production did he ask not to be filmed. It was on those occasions that he threatened us."