He’s not exactly a household name yet, but 21-year-old Jamie Blackley scored a fairly high-profile role in London Boulevard and will be seen this summer in the big budget Snow White And The Huntsman. Now he’s booked another role that’ll almost certainly help out his fledgling film career, playing Calisto in 300: Battle Of Artemisia.

Calisto is a teen whose desire to become a heroic man/soldier like his father, leads the 16-year-old to become the leader of a small band of soldiers. He joins Sullivan Stapleton, who got a lead role in the movie last week.

300: Battle of Artemisia is based on the Frank Miller graphic novel, which is told from the point of view of Xerxes, the tyrannical ruler who was portrayed by Rodrigo Santoro in 300. The tale spans over hundreds of years as Xerxes tries to attain godhood, but mainly focuses on the Battle of Artemisia in 480 BC, where he went up against the brutish but brilliant Themistocles (the battle only took place in Artemisia as the rather corrupt Themistocles had accepted a bribe to keep his fleet in the city). This battle took place almost simultaneously to the one at Thermopylae, chronicled in 300. (Source: Deadline)