Kiss Kiss, Bang Bang.
So I've always been a big fan of Robert Downey, Jr. But now I kind of love Val Kilmer, too.
Did anyone actually see this movie in the theater, though? It had the world's crappiest trailer -- it made the movie look like a generic lame comedy/action movie, when actually it was an affectionate send-up of books like this*. Wicked fun.
*The screenplay was also based in part on one of Brett Halliday's books.