See the Stars' Comic-Con Style

Credit: Chelsea Lauren/WireImage (3); Joe Scarnici/FilmMagic

Comic-Con cuties!

Thursday marked the kickoff of Comic-Con International in San Diego this week, where a slew of A-list stars have been stepping out to promote their upcoming flicks.

Joining her fellow Twilight cast mates to promote Breaking Dawn, Ashley Greene, 24, stepped out in a blue and white Cut25 by Yigal Azrouel dress and nude Jimmy Choo pumps.

Amanda Seyfried, 25, brightened things up in a kelly-green Prabal Gurung Resort 2012 number and black heels. The star stepped out at the festival to promote her new film In Time, where she stars opposite Justin Timberlake.

Twilight star Nikki Reed, 23, donned a floral frock by Dolce & Gabbana and black platform pumps while her co-star, Kristen Stewart opted for a more casual look. Clad in dark skinny jeans and Converse sneakers, the 21-year-old actress sported a black bra underneath a sheer, white Market T-shirt.