Some intresting facts
Jack Nicholson and Micheal Caine are the only two actors nominated for an Academy Award for acting (either lead or supporting) in every decade since the 1960's.
They both stared together 1996 black comedy crime drama Blood and Wine (which I haven't seen in years but is a pretty good movie).
Was good friends with Terence Stamp (Supermans Zod). They shared a flat in the 60s. Is also good friends with Quincy Jones.
Was in 1978 movie Calfornia suite with probabley oddest cast ever. The cast included Jane Fonda, Bill Cosby, Water Matthau, Richard Pryor and Maggie Smith.
In Austin Powers GoldMember Mike Myers has said that his glasses in all three films are meant to look like those worn by Michael Caine in The Ipcress File (1965), so Caine took the original glasses (model "Teviot 74" by UK Optical) to the set and wore them as Nigel.