Summit Entertainment has arranged with the major theater circuits for Thursday midnight or Friday morning shows. As of noon ET today, Twilight has already sold out 389 performances at MovieTickets.com, including more than 140 this past weekend alone. Four days prior to its release, Twilight is already No. 20 on MovieTickets' Top-20 Pre-Sale List of All-Time. The pic has accounted for 85% of tickets sold on the site today. Meanwhile, Warner Bros is using Twilight to debut its new Harry Potter And The Half-Blood Prince trailer which aired first on the net this weekend. You may recall that Potter vacated the November 21st release date which Twilight grabbed.