Hollywood ? Not a single foot of film has been shot, the movie doesn’t open for a year and a few critics already are denouncing it, but “The Da Vinci Code” nevertheless has made its multiplex debut.

Sony Pictures, the studio behind the upcoming Ron Howard-directed adaptation of Dan Brown’s mammoth best-selling novel, has released a short “Da Vinci Code” trailer, which has been playing in a number of theaters just before “Star Wars: Episode III Revenge of the Sith.”

The “teaser” trailer, as such early previews are called, is debuting just as Britain’s Westminster Abbey announced it would not allow Howard’s movie to film there because the Abbey considers the book “theologically unsound.”

But the movie will be able to film inside the Louvre, the famous Paris museum in which the book’s opening murder scene is set.

The “Da Vinci Code” teaser trailer, which has been playing on an unspecified number of “Revenge of the Sith’s” 9,000 film prints, sets to accomplish three things: stake out the film’s release date of May 19, 2006, and thus keep other competing movies at bay; remind the book’s legion of readers that the film is in the works; and establish the production’s international cast, which includes Tom Hanks, France’s Audrey Tautou and Jean Reno, and England’s Alfred Molina, Ian McKellen and Paul Bettany.

“It just seemed like there’s so much knowledge and awareness of this book, it seemed natural” to run a trailer a year early, said Brian Grazer, Howard’s longtime producing partner. Along with John Calley, Grazer is producing “The Da Vinci Code.”

Without any film to include in the “Da Vinci Code” spot (production commences at the end of June), Sony and trailer maker Intralink Film Graphic Design concocted a computerized model of what appears to be a desert landscape.

The camera swoops into the apparently parched earth as a narrator intones, “What if the world’s greatest works of art held a secret that could change the course of mankind forever?”

The dry canyons are soon revealed to be cracks in the painted canvas of the “Mona Lisa.” At that point the narrator says, “No matter what you have read, no matter what you believe, the journey has just begun.”