Did his own singing while playing Jim Morrison in The Doors (1991). The real members
of the band said they had difficulty distinguishing Kilmer's voice from
that of Morrison's.
Upon playing Batman: "I've done an absurdly commercial cartoon and now
I'm more likely to get hired for a job I couldn't get hired for before,
because I hadn't done enough movies. It's so rare when an actor gets
hired because he's right for the role - it just doesn't figure into
it."
ट्रेडमार्क
In many of his movies, he twirls small objects (coins, pencils,
etc.) with his fingers.