Monaco's Prince Albert and his siblings slammed the screenplay for a film starring Nicole Kidman about their mother and former Hollywood actress Grace Kelly as glamorized fiction, Reuters reports.

The current monarch of the tiny Mediterranean state and his sisters Princess Caroline and Princess Stephanie said in a statement released by the royal palace of Monaco that the film project "Grace of Monaco" contained "historical untruths" and that some parts were "purely fictional."

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The statement was intended to shoot down a story in the French magazine Paris Match, which said the Monaco royals had been reassured by producers about the credibility of director Olivier Dahan's film project.

"Having in no way been associated with this project, Their Highnesses were quite surprised when they received the script," said the statement emailed to Reuters Thursday.

The star of Hollywood classics such as "To Catch a Thief" and "High Society" as well as Alfred Hitchcock's "Rear Window" and "Dial M for Murder" became Princess Grace when she married Albert's father PrinceRainier of Monaco in 1956. Princess Grace died in a 1982 automobile accident.

The film is billed by production company YRF Entertainment as a story of the newly minted Princess of Monaco proving herself against all odds by leading her adopted country against France when it tries to take over Monaco. Prince Rainier is played by Tim Roth.