The actor showed off some seriously sticky armpits at a press conference in Tokyo yesterday promoting his new movie Mission Impossible: Ghost Protocol.
Tom spent a good hour greeting fans at Tokyo airport and another hour signing autographs at the film's premiere, so it must have been all that mingling with his admirers that got him so hot and sweaty.
Tokyo just experienced its coldest winter day – so he can't blame this wardrobe malfunction on the weather!
More sweaty celebs in our gallery…
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