Emma Watson was forced to take method acting to whole other level while filming Noah.

In an article for Wonderland magazine - which the 23-year-old guest edited - Emma revealed that she became sick after drinking some dirty water on set, where director Darren Aronofsky banned plastic water bottles: "I was so tired one morning I picked up a mug from my trailer and drank some stagnant water that had been there for the duration. I was so ill... Having no water bottles on set at five in the morning, when you're exhausted and delirious, wasn't ideal."

When she told Aronofsky that she wasn't feeling well, the director instructed her to use it for her scene. "I turned round to the bus and was like: 'Is he joking?' and there was deadly silence," Emma recalled.

Fans will see whether or not Aronofsky's directing methods work when Noah hits theaters March 28.