A DISH EATEN COLD
While busy plugging his new hit movie, Robin Hood: Prince of Thieves, Kevin Costner had no kind words for Truth or Dare, the Madonna documentary in which he makes a memorable cameo by visiting backstage after a concert and telling the singer her show was "neat." After he leaves, Madonna sticks a finger down her throat and makes a gagging sound. "I don't know why I was in the film," says Costner, 36. "They gave us [Costner and wife Cindy] tickets. She invited us. I don't know why she would do that." But Costner may have gotten his revenge: Variety reported that Madonna went after the costarring role in The Bodyguard, a film Costner begins shooting in November. Whitney Houston got the part.

LEGGO MY EGO
Actor Keith Carradine, 41, will gladly strum a guitar for a part, as he does in his new movie, The Ballad of the Sad Cafe, and onstage in Broadway's The Will Rogers Follies, but he doesn't like to play second fiddle. "I heard they were using Sam Shepard [in Sad Cafe]," said Carradine, speaking at Minneapolis's Walker Art Center. "Then my agent called. Apparently Sam couldn't do it. I was desperate to do the part, everything appealed to me, but I was kind of insulted. Finally, my good sense overcame my ego."

MANE ISSUE
Now it can be told: why Penny Marshall became a director. "I'm often asked why I like directing more than acting," says Marshall, 47, who next directs Tom Hanks and Madonna in A League of Their Own, a period baseball picture. "Simple. Because you can arrive on the set with dirty, stringy hair. You don't have to look pretty or be well groomed to direct. Just look at Sydney Pollack, Barry Levinson or Woody Allen. Not much on hair."

SLAMMING THE DOOR
Guitar great Joe Walsh, whose new album is aptly titled Ordinary Average Guy, says he has never understood the lionization of rock stars by young fans. "A whole bunch of us are complete idiots, but kids need something to identify with," says Walsh, 43. "What's the big deal about Jim Morrison, for instance? Why did they make a movie about him? Why is he a rock martyr? The idiot drowned in a bathtub. Is that cool? I don't think so. It's a lot harder to stay alive and deal with it. And he couldn't even sing for s—-. He OD'd—anybody can do that. That's pitiful."