Inside the issue - which is available for just £1.99 on your iPad - Green reveals that she loved playing badass Artemisia because it didn't require her to reform to the typical girlfriend movie role.
"She's so ballsy," she says. "She's not a girlfriend or a love interest; she's got guts, she's fuelled by revenge.
"She's a very complex character, very exciting. It's always been a fantasy for me to play an action hero. She's a baddie, but she's a cool baddie; she's human to an extent."
300: Rise Of An Empire is in UK cinemas now.
For more from Green, pick up the brand new issue of Total Film , which is out now , and includes an exclusive look at Captain America: The Winter Soldier , Avengers: Age Of Ultron , X-Men: Days Of Future Past and Godzilla , plus many more exciting new movies.