There is something unnatural about marriage. These two people are not going to be the same people in a few years. The trick is to live your own life while sharing the same space.

In terms of the stars, the only ones I cast were Billy Connolly and Pauline Collins. I was in Los Angeles working and a lot of this took place on the telephone. I'd met Maggie [Smith] once and I'd come back-stage, which I'm usually loathe to do because as an actor you don't want people coming back because you want to get home [laughs].

Acting didn't solve much! If it did, I would have ended up much less crazy than I am today, but I'm not. At least for me, acting is a relief - a relief to be able to admit certain things about myself and disguise in my work, in my characters.

So, they had this 40-odd year friendship with each other and with Mr Harwood. So, when I came on it Albert, Tom and Maggie were in the cast. But then Albert wasn't up for it, so he had to withdraw.

This is not a movie about smelling the urine! It's another kind of movie." Volker Schlöndorff got Billy Wilder to agree to these conversations - you can buy it - because Volker spoke German at times. And he said to Billy Wilder: "What is in your mind?" And he said: "If you're going to try to tell the truth to the audience, you'd better be funny or they'll kill you." And I haven't forgotten that.

One of the things you can do as an actor, is compensate for the things you can't do in life.

We need to band together as a unit every day, especially to conquer the strength of the AIDS virus.