Michael Caine has updated his official website with the following blurb about his role as Alfred in The Dark Knight:
I have just got back from my second trip to Chicago where I am shooting Batman, my jet lag has gone so I feel like updating this site.
I have one more stint in Chicago in a month time, then I will be finished on the 2nd Batman the great revelation of working on this is Heath Ledger who plays the "The Joker". I have seen him on film and I have worked with him and I must say it is quite an extraordinary performance.
The follow-up to the action hit Batman Begins, The Dark Knight reunites director Christopher Nolan and star Christian Bale, who reprises the role of Batman/Bruce Wayne. In the new film, Batman raises the stakes in his war on crime. With the help of Lieutenant Jim Gordon and District Attorney Harvey Dent, Batman sets out to dismantle the remaining criminal organizations that plague the city streets. The partnership proves to be effective, but they soon find themselves prey to a reign of chaos unleashed by a rising criminal mastermind known to the terrified citizens of Gotham as The Joker.