The first San Diego Comic-Con (SDCC) was a single-day event for comic book fans on March 21, 1970. After that successful trial run, the organizers staged a three-day event featuring celebrity appearances later that year. Comic-Con grew quickly from a modest gathering of dedicated fans to the massive multimedia spectacle of SDCC that begins today. Each year, more than 100,000 Comic-Con attendees dress as their favorite characters from the books, television shows, and movies that they love.