The CW announced today early renewals for its popular horror-themed television shows “The Vampire Diaries” and “Supernatural.” Both series perform phenomenally well with horny women ages 18-to-34, giving the network its highest ratings.

(UPDATE: Want to meet the cast of “The Vampire Diaries” at Paleyfest 2010? Go here for more info)

The following is the CW’s official press release:

The series receiving early renewals include this season’s breakout hit THE VAMPIRE DIARIES, The CW’s most-watched show (4.6 million viewers) and the network’s number one show among adults 18-34 (2.5/8).

THE VAMPIRE DIARIES premiere generated the largest audience in network history for a series debut (5.7 million total viewers). THE VAMPIRE DIARIES has improved The CW’s performance Thursday at 8:00 p.m. by 114% among women 18-34 this season.

The network also renewed fan favorite SUPERNATURAL, which will enter its sixth season next year. SUPERNATURAL has one of the most loyal audiences of any show on television and does heroic work in a perennially tough time period.  It has improved over last season among women and adults 18-34 (29% and 8%, respectively) this season, a remarkable accomplishment for a fifth-year show.

“The Vampire Diaries” stars Nina Dobrev, Paul Wesley, and Ian Somerhalder, known to those of us without vaginas as Boone on ABC’s “LOST.” Created by Kevin Williamson, producer of “Dawson’s Creek” and the scribe behind the innovative Scream films, “Diaries” follows a high school girl’s complicated love triangle with two vampire suitors … who happen to be brothers.

To see photos of the cast’s recent meet-and-greet with fans in Los Angeles, click here.

“The Vampire Diaries” and “Supernatural” both picked up People’s Choice awards this year for Favorite New TV Drama and Favorite Sci-Fi/Fantasy Show, respectively.