C2E2 was held for the first time April 16–18, 2010, with an estimated attendance between 20,000 and 30,000 attendees. The convention included dozens of professional and amateur comic book artists, and prominently featured booths from the biggest comic book publishers. The convention also featured a special auction with the actual props from the original Iron Man movie. The second C2E2 was held March 18–20, 2011 and included Thor actor Chris Hemsworth. The third C2E2 was held April 13–15, 2012, and 41,000 attendees were reported.The fourth C2E2 was held April 26-28, 2013, and 53,000 attendees were reported.