Will Smith has been in Tokyo to promote his new sci-fi flick, I Am Legend.

The Hollywood star arrived in the city by helicopter and admitted "it felt good".

"I heard no one had ever done that before," he said. "The Black Hawks (helicopters) are actually used in the film so I guess they were open to it. It was quite an experience to see Tokyo from the air like that."

Smith plays Robert Neville, a scientist who ends up living alone in New York with only his dog for company, after the whole city is wiped out by a terrible disease.

Immune to the virus, he spends the next three years looking for food and possible survivors - but they are all infected and are waiting for a chance to infect him too.

I Am Legend opens in the UK on December 21.

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