Michael Keaton supports himself with crutches outside the Ed Sullivan Theater for the 'Late Show With David Letterman'. New York City, USA - 20.04.09

The former Batman star revealed his injury during an appearance on David Letterman's Late Show on Friday (24Apr09).

Keaton refused to reveal the real cause of the break, just saying, "I don't want to make a big deal about it. I broke my foot."

Instead the pair pretended he had hurt himself rescuing kids from a fire. Letterman screened a fake newscast by broadcaster Anderson Cooper, that claimed: "Michael Keaton broke his foot rescuing twelve children from a burning orphanage."

Source: WENN