Finally, an explanation for that high-pitched squealing sound you've been hearing: To the delight of 'Twilight' fans everywhere, a "leaked" copy of an alleged 'The Twilight Saga: Eclipse' script has made its way online.

The script's pages are watermarked with actor Jackson Rathbone's name -- Rathbone plays Jasper Hale in the film -- which would appear to legitimize the pages. Scripts are marked with actors' names to help them keep track of their copy, particularly in cases where the script is supposed to be, you know, top secret. Finally, an explanation for that high-pitched squealing sound you've been hearing: To the delight of 'Twilight' fans everywhere, a "leaked" copy of an alleged 'The Twilight Saga: Eclipse' script has made its way online.

The script's pages are watermarked with actor Jackson Rathbone's name -- Rathbone plays Jasper Hale in the film -- which would appear to legitimize the pages. Scripts are marked with actors' names to help them keep track of their copy, particularly in cases where the script is supposed to be, you know, top secret.

Still, the validity of the script is unknown. Though Twitter has been swamped with speculation about the script's authenticity, the Dish Rag notes that the posted version is a "blue script," an earlier draft of the screenplay that was likely not the final shooting script.

Either way, Rathbone will likely get a talking-to from the film's producers. The stakes are high: The most recent installment of the Twilight saga, 'New Moon,' has taken in $682 million (and counting) at the box office worldwide.

A similar leak took place last year, when a St. Louis salon owner found a copy of the 'New Moon' script in a trash can outside the hotel where Anna Kendrick was staying while filming her role in 'Up in the Air.' In that instance, however, the hairdresser returned the script to the film's producers -- without revealing its contents -- and received tickets to the film's premiere as a thank you.

As of yet, Summit Entertainment -- the studio who produces the 'Twilight' saga -- has made no comment on the leak, so it looks like fans will have to wait for the film's release to know whether the script was real. They won't have to wait long. 'Twilight: Eclipse' shot in Vancouver this past fall and will be released in June 2010.