Another supporting cast member of 300: Rise of an Empire is put front and center in the latest Comic-Con 2013 character poster, with today's one-sheet featuring Jack O'Connell as Calisto. Little is known about this character, except that war is in his blood, which likely means he comes from a long line of proud warriors. In case you missed the first two posters, you can CLICK HERE for Lena Headey's one-sheet, and CLICK HERE to see a masked Persian soldier, which will be on display at the San Diego convention this week.

<strong><em>300: Rise of an Empire</em></strong> Jack O'Connell Poster
"War is in my blood! Jack O'Connell (@JackO__C) is Calisto in #300movie: Rise of an Empire. #ComicCon #SDCC"