In the not-for-profit world, I never felt that being female was an impediment. I was, however, given my break into commercial theatre by a female producer, Judy Craymer, and women - in particular, Donna Langley, president of production at Universal - were crucial in giving 'Mamma Mia' a home in Hollywood.

There's something about doing Shakespeare with a single gender, whether it is all-male or all-female, that opens up certain possibilities. You are able to throw the behavior of the men into a particular relief and be playful within a slightly larger-than-life way with it.

I think Margaret Thatcher was a superstar in this country, and I think we all felt we needed a superstar to play her, somebody of huge intelligence, passion, and power and warmth.

In management terms, directing opera certainly prepares you for a film set: the magnitude of it, the experts in other fields that you have to call on. Both are massive ensemble jobs in which there's incredible pressure to get things done on time and on budget - so much so that making the wrong decision may be better than making no decision at all.