And The Winner Is . . .

The Marx Brothers or Martin Scorsese?

Casablanca or Citizen Kane?

That's the decision facing 1,500 experts and film-industry figures who have been asked by the American Film Institute (AFI) to vote for the 100 Greatest Films.

The voters, who include Gregory Peck, Dustin Hoffman, and Steven Spielberg, as well as President Clinton and wife Hillary, have been asked to narrow down a list of 400 films to 100 titles.

The results of the secret ballots will be revealed in a three-hour special on CBS Tuesday night.

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"We are treating this with Oscar-like security," says AFI director Jean Picker Firstenberg.

The broadcast is being hosted by Richard Gere, Sally Fields, and Jodie Foster. It will feature such directors as Spielberg, Woody Allen, and Clint Eastwood, and such stars as Julia Roberts, Charlton Heston, and Dustin Hoffman.

Starting June 23, the TNT cable channel will begin a 10-part series analyzing the winners. The Turner Classic Movies cable channel also is planning to broadcast many of the winners in a weeklong film festival in the fall.

In addition. film studios plan to re-release videotapes of the selected films in special commemorative boxes.