Cate Blanchett has admitted she was nervous about signing up to play a complex character in Woody Allen's new film.
The actress, 44, stars as a New York socialite who's suffered a breakdown triggered by the cataclysmic collapse of her marriage to a wealthy financier in Blue Jasmine.
"I was terrified and excited about accepting the role," the star said.
"It was such an incredible opportunity, so complicated, and there was so much to do, so many avenues to explore, her physical, as well as mental state."
Cate added about the research she had to do to play her character's freefall: "W hat happens when you take [anti-depressant] Xanax and alcohol?"
She laughed: "I had a little bit of vodka but I didn't do the Xanax! But it's amazing what you can find on YouTube."
Cate said she didn't get much shut eye as she worked on the role.
"There's a lot of talk in Woody's films, so there's a lot to get your head around. I didn't sleep a lot," she said.
:: Blue Jasmine is released in cinemas on Friday, September 27.