Wednesday Afternoon Update (12:44 p.m. PT): New Moon has now reached the #1 spot on the MovieTickets.com advance sellers list by topping Star Wars Episode III: Revenge of the Sith.

Tuesday Afternoon Update (12:48 p.m. PT): MovieTickets.com is now reporting 2,150 sold-out showings of New Moon, 200 of which are spread out among New York and Los Angeles.

Monday Morning Update (6:28 a.m. PT): Fandango.com is now reporting that New Moon is the best advance seller in the company's history. The top five sellers are:

1. New Moon (2009)
2. Star Wars: Episode III - Revenge of the Sith (2005)
3. Harry Potter and the Half-Blood Prince (2009)
4. The Dark Knight (2008)
5. Twilight (2008)

Thursday Morning Update (8:37 a.m. PT): According to Fandango.com, New Moon has passed Twilight to become the 4th largest advance seller in the company's history. The Summit release is also tracking to become the #1 seller of all time.

Wednesday Afternoon Update: "Twihards" are scooping up tickets in droves as the November 20 release of The Twilight Saga: New Moon draws near.

If the film exceeds expectations, it could end up hurting the legs of 2012 as well as the opening weekends of Thanksgiving releases such as Old Dogs and Ninja Assassin.

From MovieTickets.com:

More than a week prior to its Nov. 20 release, New Moon has sold more than four times as many tickets as Twilight at MovieTickets.com at the same point in the sales cycle.

MovieTickets.com reports more than 1,300 sold out performances for the Twilight sequel New Moon—including 900 midnight performances—with a large number of tickets still available.

“The fact that New Moon is outpacing Twilight at a 4-to-1 ratio really speaks to the incredible fan base the film has built in just the past year,” said Joel Cohen, executive vice president and general manager for MovieTickets.com. “That, combined with the increasing number of consumers buying their movie tickets online, could put this film in a position to be one of our top advance ticket sellers of all-time.”

New Moon also accounts for 74 percent of all ticket sales at MovieTickets.com this week.