Diane Lane has revealed that the plot of 'Superman: Man of Steel' will cover the superhero's life ''from infancy on''.
The actress - who has been cast as the caped crusader's adoptive mother Martha Kent in the upcoming film - says she was locked in a room with The Script for three hours to ensure the plot remains a secret - but still revealed that Superman's origins will be covered.
She told E! Online: "I read the script under lock and key. I was locked in a room with the script and was only allowed three hours with it. I nailed it into my memory. I'm really excited.
"I'm really not allowed to talk much about it, I think, but it does cover the entire range of years, from infancy on."
Zack said of Diane's involvement: "This was a very important piece of casting for me because Martha Kent is the woman whose values helped shape the man we know as Superman."