Child star Dylan Sprayberry had no idea he was auditioning for a role in Superman blockbuster Man Of Steel when he entered the casting process because the tryouts were kept completely secret.

The actor plays a young Clark Kent in the new superhero film, while British star Henry Cavill takes over as the character grows up.

However, Sprayberry admits he wasn't told he was in line for the coveted job until his third audition.

He tells, "I probably went in about four or five times for the audition and they were keeping everything really under wraps. They didn't want anyone to know what it was for, they wouldn't tell me anything. I did a monologue from (1986 film) Stand By Me... I got the third callback and I found out that it was going to be for Superman and... that's when I met (director) Zack and (producer) Deborah Snyder... I kept going back in a few times just to match up and make sure that I look like Henry."

He adds of landing his dream role, "I think a lot of the percentage of young boys when they are growing up want to be a superhero. I know I did. I would put a towel on my back, run around, and across my couch and try to practice flying and things like that. So I was definitely a fan just of superheroes in general and then you have Superman the ultimate superhero - it was like a dream come true."