From the interview with BILD
I'm perfectly ok with that. No one really knows, and you'll know when you get there. Want to know? Kill yourself, the best way to know. Do you still want to believe? I'm ok with that, as long as no harm is done.
BILD: Do you believe in God?
Brad Pitt (smiling): “No, no, no!”
BILD: Is your soul spiritual?
Brad Pitt: “No, no, no! I’m probably 20 per cent atheist and 80 per cent agnostic. I don’t think anyone really knows. You’ll either find out or not when you get there, until then there’s no point thinking about it.
However, I like Angelina Jolie better
Obvious reasons are obvious.