Every person should have their escape route planned. I think everyone has an apocalypse fantasy, what would I do in the event of the end of the world, and we just basically - me and Nick - said what would we do, where would we head?

I hesitate to say I was the class clown, but that was kind of how I interacted with other kids in school, and I very much appreciated the responses I got. The validation of laughter is often a very heavy psychological balm.

The thought of filming in London was a big draw because I could stay in my house. I read it, and I was really taken with it because it felt at once very unapologetic for what it was, which is a romantic comedy. But at the same time, a little spiky and a little truthful.

If there is no fate and our interactions depend on such a complex system of chance encounters, what potentially important connections do we fail to make? What life changing relationships or passionate and lasting love affairs are lost to chance?

Happiness is where you start from rather than where you go. God, I sound like Yoda.

Also, if you watch the film once, there are lots of things that you won't get because there are punch lines in the first act, the setup to which isn't until the second act.

That's always important to us, is being truthful. Not guessing, not making any assumptions. Just coming at it with knowledge.