Harris played the main cast role of Thomas the Disciple, and later Thomas the Apostle in the 1999 biblical, historical, drama television film version of Jesus. Throughout the film, Thomas struggled violently with his unbelief in anything he could not see, touch, hear, nor know until the resurrection of Jesus when his hand had been placed within the wounds of Jesus. At that point, faith came to Thomas the Disciple and Jesus became the "Lord and God" of Thomas the Apostle. His notable roles include that of Joy Division's lead singer Ian Curtis in Michael Winterbottom's 2002 film, 24 Hour Party People and as Steven in the film short, True Love (Once Removed), directed by Kevin Thomas. The film won Best Short Film at both the Palm Springs and Houston Film Festivals, was selected for the Clermont-Ferrand, London Raindance and Los Angeles Short Film festivals and also qualified for an Oscar nomination in 2004.