Chris Evans presented Captain America to throngs of enthusiastic fans at Comic-Con, a day ahead of its US opening.
The film's star introduced the latest Marvel film to the Comic-Con crowd, amid uniformed soldiers, dancing girls and fans in Captain America t-shirts and full costumes.
"I love this movie. I really think we've got something special here," Chris said to the packed theatre audience.
"I can't always be this enthusiastic, because I don't always like my movies," he added.
With that, fans donned their special Captain America 3D glasses and settled in for the two-hour ride. The pre-show excitement was so great that people clapped for the Paramount logo and cheered when the Marvel imprint came on screen.
Fans gathered before dawn for a chance to see the first public showing of the anticipated Marvel movie. They were rewarded for their devotion with free posters, buttons and T-shirts that read "First to see the first Avenger."
Fans' enthusiasm remained constant throughout the action romp, where Chris plays Steve Rogers, a good-hearted but small-statured guy who enlists in the Army and submits himself for an experimental treatment to become a super soldier. Spontaneous applause erupted when Chris first came on screen, when Stan Lee made his requisite cameo and when Samuel L Jackson appeared as the eye-patch-wearing Nick Fury.
After the credits rolled, fans were treated to a teaser trailer for next summer's superhero-packed The Avengers, providing fans with a first look at the film and all its superstar superheroes in one dazzling, blink-and-you'll-miss-something preview.