THE TWILIGHT SAGA: BREAKING DAWN-PART 1Robert Pattinson and Kristen Stewart will finally get to put on the show they’ve been promising in “Breaking Dawn Part 1,’ and studio Summit Entertainment is predicting a block buster this weekend.

The studio estimates it will rake in as much as $125 million during the opening weekend, starting with midnight Thursday showings, while outside estimates are predicting a new “Twilight” record.

After much hype, and a global promotional rollout by Rob, Kristen, Taylor Lautner, Ashley Greene and the rest of the “Twilight” cast, diehard fans are already lining up for the movie’s wide release tomorrow (Nov. 18).

An internal Summit estimate estimates that “Breaking Dawn Part 1” will gross $110 million to $125 million, according to movie Web site deadlinehollywood.

If the opening estimates are on target, Breaking Dawn, Part 1, will be the second highest grossing debut in the four film “Twilight” series.

The original “Twilight,” which opened in Nov. 2008 was no schlep. It grossed $69.6 million in 3,419 theaters, according to boxoffice mojo. It went on to gross $191.5 million, domestically.

The hype from the first movie propelled its sequel, “Twilight: New Moon,” to the No. 1 spot with an opening Nov. 2009 weekend gross of $142.8 million from 4,024 theaters. It went on to gross $296.6 million domestically.

“Twilight: Eclipse,” which opened in 2010 has been the most disappointing so far, relatively speaking. It grossed $64.8 million on its opening weekend and $300.5 million during its 16-week domestic run in 4,468 theaters.

Other estimates predict that “Breaking Dawn” will come in at New Moon’s $142 million opening gross, and possibly even higher.

The film will be released in more than 4,061 locations in North America. The estimates do not include midnight openings on Thursday.

More than 1,000 showtimes have sold out in advance on Fandango, which says theater owners are scrambling to add more screenings to meet the fan demand, according to deadline.

Fans are already lining up in front of theaters, the Web site reports.