Inside the issue - which is available for just £1.99 on your iPad - Saldana reveals that the idea of the guardians baffled her at first.
“I was like, Guardians?" she says. "There's a person that's a tree and there's a racoon? Apparently they fight with The Avengers. I didn't even know who The Avengers were!"
The 35-year-old actress adds that part of the reason she eventually signed up – to play green-skinned alien Gamora – was down to director James Gunn.
"He's my kind of director," she enthuses. "Animated, passionate, alive, young, fresh, full of ideas, and willing yo give 150 per cent."
Guardians Of The Galaxy o pens in the UK on 1 August 2014.
For more from Saldana, pick up the brand new issue of Total Film , which is out now , and includes an exclusive look at The Amazing Spider-Man 2 , Godzilla and The Lego Movie and many more exciting new movies , plus we chat with Colin Farrell.
And because January can be a depressing old month, we've also got an amazing bumper giveaway. There's a FREE official Man Of Steel movie guide for every reader, plus three e-books ( Nexus by Ramez Naam, Scare Me by Richard Parker and Blackwood by Gwenda Bond) courtesy of Angry Robot, Strange Chemistry and Exhibit A.