If having to shoot her scenes between 4am and 7am in the morning wasn't bad enough, Emma Watson has revealed how she fell ill on the set of Noah after director Darren Aronofsky banned bottled water.

Russell Crowe NoahRussell Crowe Stars in Darren Aronofsky's 'Noah'

Watson, who plays Noah's adopted daughter Ila in the big-budget movie, told Wonderland magazine that the movie's pro-environmental message meant the crew were not allowed to bring bottled water on set.

"Because of the storm, Douglas [Booth] and I ended up shooting most of our scenes between 4am and 7am - and at that time I never function well," said Watson, "Because the film has a pro-environment message, Darren didn't want anyone drinking from plastic water bottles on set either. So that made things slightly harder."

"Everything we used had to be recycled or recyclable. Having no water bottles on set at five in the morning, when you're exhausted and delirious, wasn't ideal. 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 - so three months. I was so ill."

Watson was asked to use her illness to her advantage in the scenes, saying "I came in the next day and was like: 'Darren, I don't think I can do this, I'm really sick.' He was like: 'Use it for the scene.' And I turned round to the bus and was like: 'Is he joking? He is joking right?' and there was deadly silence."

Watch the 'Noah' trailer:

The new interview gives an insight into the shooting conditions on the movie and Watson suggests it wasn't just her who struggled. 

"We started filming in the summer in New York. It was so hot that Ray Winstone at one point, who wore a beard and heavy make-up, nearly fell down a flight of stairs," she said. "His make-up was literally melting off his face."

The $130 million movie is one of the most controversial big-budget productions of recent times, with reports suggesting Paramount executives cut six alternative versions following negative reactions from test screenings for religious audiences. Last week, Aronofsky claimed to have won a battle to ensure his own cut will be the one that cinemagoers will see in cinemas.

The movie stars Russell Crowe in the titular role. It is due for release in the US on March 28 and in the UK on April 4.