WATCH: Avengers: Age of Ultron Clip Leaks Online

Marvel Studios announced its entire slate of "Phase 3" films planned for its cinematic superhero universe at a special event earlier this week. Among the films announced: Captain America: Civil War, Black Panther, and Captain Marvel - which will be the first film of the Marvel movie universe to feature a female superhero as the film's lead.

In addition to the list of films announced, the audience at the event was also shown a never-before-seen clip of Avengers: Age of Ultron highlighting the building tension between Captain America (whose ability to wear tight t-shirts is arguably a superpower) and Iron Man - an excellent set up for Captain America: Civil War.

Thanks to one naughty audience member, the clip has now leaked online.

Watch while you can: