Hayden Panettiere and Ali Larter attended "Heroes: Countdown to the Premiere"

With the fall television season upon us, there's excitement in the air for our favorite shows to start airing new episodes. And Hayden Panettiere was all about getting Heroes fans revved up at a very special event.

The "I Love You Beth Cooper" babe was dressed to impress at the "Heroes: Countdown to the Premiere" event in Los Angeles last night (September 7).

Miss Panettiere sported a black jacket with matching black trousers and a shortened coif as she made all the necessary preparations before going on-camera to address the audience.

Also in the house was Hayden's co-star Ali Larter, looking fine in a wispy black and white summer dress as she made her way around the event, posing for pictures and meeting and greeting attendees.

Enjoy the pictures of Hayden Panettiere (and Ali Larter) at the "Heroes: Countdown to the Premiere" event (September 7).