Michael Caine has described the plot to Batman sequel ‘The Dark Knight Rises’ as "really extraordinary".
In an interview with Collider, Caine, who plays butler Alfred Pennyworth in the Batman trilogy, said: "We've all signed the Official Secrets Act. I'm lucky to be able to tell you the title of the movie.
"I remember I did an interview and someone said to me, 'What are you doing next?' I said, 'I'm doing Batman'.
“I saw Chris and he said, 'Why did you tell them you were doing Batman? You're supposed to keep it secret'...I couldn't keep that a secret."
He added: "Let me tell you...the plot is extraordinary...really extraordinary. I know why he wants to keep it a secret. You really need not to know till you see the movie."
He did say however: “It’s fantastic. I started filming last week and I film next week.
"As the butler, I do a load of filming at the beginning, and everybody goes off and does all the adventures and they all come home shot to pieces and I patch them together when they all get back.”
Caine, who also worked with Nolan on last year's on a number of films including ‘Inception’ and ‘The Prestige’, was quick to praise the director.
"Christopher Nolan, I think, is one of the greatest directors in the world and I've been lucky [to work with him].
"This is my fifth movie with him. It's such a pleasure to work with him and he's so clever."
‘The Dark Knight Rises’, which also stars Christian Bale, Morgan Freeman, Tom Hardy and Anne Hathaway, is set for release on 20 July, 2012.
