By Leah Ornstein - Breaking Celebrity News Style & Beauty Editor

It was an exciting day for Twilight fans, as the cast of Breaking Dawn made an appearance at Comic-Con in San Diego - and Breaking Celebrity News has the

photos.

Kristen Stewart, Taylor Lautner, Robert Pattinson, Nikki Reed and Ashley Greene were just a few of the popular film franchise's stars to sign

autographs and pose for photos at the annual convention.

While her costars got a little more dressed-up for the promotional appearance, Kristen wore a totally sheer Market White Patti Tee (which revealed her black bra!) with dark jeans.