Josh Brolin was under such pressure during his role as George W. Bush in a film of the U.S. president's life, he broke out in hives. The No Country for Old Men star admits he became obsessed with learning Bush's mannerisms for his role in the Oliver Stone biopic W.

The stress of trying to mimic the president's accent caused the itchy skin condition, and infuriated his wife - movie star Diane Lane - because he would talk to himself in public.

Brolin tells USA Today newspaper, "My wife got so mad at me one time. We were on a plane from Hawaii, and I'm supposed to learn all these frat names. So I'm covered in spots, and the whole flight back, I'm trying to figure out these mnemonics for these 40 names. 'She was like, 'You have to stop. It looks weird, and it's not normal.' I was obsessed."

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(This news article provided by World Entertainment News Network)