Every song has a composer, every book has an author, every car has a maker, every painting has a painter, and every building has a builder. So it isn't irrational to take this simple logic a little further and say that nature must have had a Maker. It would be irrational to believe that it made itself.
Even Helen Keller, who was born blind and deaf, could see God. No doubt, in her silent darkness, every fragrant flower, every ray of the warm sun, every taste that touched her tongue told her that there was a God who created all things. Jodie Foster shouldn't therefore be surprised that people are surprised that she's an atheist.