I didn't recognise him

I live in Sydney, I didn't recognise him but i was having lunch with a friend who did and was a massive fan. She spotted him having lunch by himself but was too shy to say something/approach. So i did, he was very polite and charming, even to the point where he asked us what we did (students at the time), where & what we studied. etc It was very nice of him to chat to us for a few minutes and sign an autograph. Turns out he was in Sydney filming the matrix.