What's been your best decade so far and why?
My 40s – the parts for an actor just get better and more varied. I was a cowardly lion for Andrew Lloyd Webber in the West End. Now I'm a murdering rapist for Michael Colgan at The Gate!
What was the worst moment of your life?
A near-death swimming incident in Australia. The irony was, I was playing a priest who actually drowns himself in Martin McDonagh's Lonesome West. It's made me cautious of the sea.
What song do you most associate with your youth?
Red Chord by the Frames. At 17, I was one of many buskers in Dublin when Glen Hansard ruled the streets. We'd all count our coins in The Coffee Inn on a Saturday evening.
When is it OK to lie?
It's not really is it? Unless you're Oskar Schindler and it saves lives.
What do you consider the greatest work of art?
The works of Shakespeare. No one has explained the human condition better, and 500 years later the man on the street still quotes him.
What local star should the world know about?
Aaron Heffernan, a young Irish/Caribbean actor, also in The Threepenny Opera about to hit the big time.
Do you have a guilty pleasure?
The "one for the road" pint with my dad at The Ennisnag Inn, his local, before I head back to London.
What's your present state of mind?
Excited that The Threepenny Opera is up and running, and charged that I get to sing my guts out at last in Dublin.
What 's been your greatest regret?
Not helping Ireland become a basketball superpower.
What are the consolations of getting older?
The ability to shock and surprise those who think they know you.
Who are your living heroes?
David Attenborough, Tim Minchin, Richard Dawkins. They make a great case for science, with flair and passion.
Best lesson life has taught you?
Take on more than you think you can cope with, and never leave the cinema before the credits have rolled. Respect the little man.
David Ganly plays Mac the Knife in the Threepenny Opera now running at the Gate Theatre, Dublin. http://www.gatetheatre.ie