Robert Sheehan is an Irish actor. He had his career beginnings in the early 2000s. He debuted in the 2003 film Song for a Raggy Boy. His first TV role was as Cormac MacNamara in the Australian series Foreign Exchange. He next portrayed Louis XIV in the TV series Young Blades. He later starred as Addison Teller in the British series Rock Rivals. Sheehan gained wider recognition for his role as Nathan Young in Misfits. During this period, he also had roles in the films Summer of the Flying Saucer, Ghostwood, and Cherrybomb. In the 2010s, he became known for his role as Darren in the Irish series Love/Hate. As of 2019, he stars as Klaus Hargreeves in the Netflix series The Umbrella Academy.