London: The cast of the new 'Avengers' film say pages of the script had to be shredded every day on set to stop details of the new movie leaking.

'Avengers: Age of Ultron' poster
'Avengers: Age of Ultron' poster. Pic/Santa Banta

Speaking at the 'Avengers: Age of Ultron' UK premiere, Elizabeth Olsen, who plays new character Scarlet Witch, said security was strict to prevent hacks, reported BBC online. "It was quite funny that we had to burn our sides for the day... we weren't allowed to go home with our little pages of whatever we shot that day. They took it from our trailers and shredded it. It's pretty crazy," Elizabeth Olsen said.

Paul Bettany, who evolves from voicing Jarvis to becoming The Vision, said the script was never emailed to him. "It was posted with a security guard. It had a name all over every page so I couldn't tweet it... it had to be delivered into my hands," Paul Bettany said.

Chris Evans, who plays Captain America, said that most Marvel films are kept secret. "Everything with Marvel is very lock and key and hush hush, you gotta sign a confidentiality agreement."