Celebrities and fans in costume at 2015 Comic-Con in San Diego

More than 130,000 fans are expected at the San Diego Convention Center over the next four days for autograph signings, TV and film presentations, toy shopping, costume contests and other artistic engagements inspired by comic books and superheroes as part of 2015 Comic-Con International in San Diego.

Thursday, "The Hunger Games" stars Jennifer Lawrence, Liam Hemsworth and Josh Hutcherson, along with the film's director and producer, unveiled the trailer for "Mockingjay-Part 2" on Thursday at the annual pop-culture celebration.

Bill Murray made his first appearance at Comic-Con to promote his upcoming film "Rock the Kashbah." Murray high-fived the screaming audience members on his way to the stage, where he discussed his role as a washed-up music manager who discovers a young talent while stranded in Afghanistan.

"I'm rock 'n' roll," Murray said. "That's what I am."

The Associated Press contributed to this report.