Sullivan Stapleton (born 14 June 1977) is an Australian actor who is best known for his roles in the SKY (BSkyB)/Cinemax/HBO television series Strike Back, the 2010 Sundance Film Festival selection Animal Kingdom and the film Kill Me Three Times.Stapleton played the lead role, Greek leader Themistocles, in the film 300: Rise of an Empire (2014). He was honored on 24 October 2013 with a Breakthrough Award at an exclusive Australians in Film Benefit Dinner held in Los Angeles.