Gwyneth Paltrow wouldn't want X-ray vision because it would be "unethical".

The 35-year-old actress, who appears in upcoming superhero film 'Iron Man', believes having such an invasive power would be morally wrong.

She said, "X-ray vision is definitely dishonest. There is an ethical line you don't want to cross."

"What powers would I want? Flying would be good. I was going to say invisibility but that also seems a bit dishonest."

Gwyneth graces the cover of USA Weekend magazine alongside Maggie Gyllenhaal and Liv Tyler, who will also star in superhero movies this summer.

Gyllenhaal, who stars as lawyer Rachel Dawes in upcoming Batman movie 'Dark Knight', believes she is not cut out to possess special powers.

She said, "I'd get into too much trouble if I could read minds or become invisible or see through people's clothes."

Liv, who will play heroine Betty Ross in 'The Incredible Hulk', revealed: "I'd like to be the comic book character Aquaman and breathe underwater."

'Iron Man' hits cinemas next month, while 'The Incredible Hulk' follows in June. 'The Dark Knight', in which the late Heath Ledger stars, is scheduled for release in July.

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