All kinds of people go to comic cons from attendees, cosplayers, vendors, artists, and celebrity guests.
If you're looking for a list of vendors, artists or celebrities attending a specific local con, your best bet is to check the official website for that event. There you will find who's coming and what days they'll be doing panels and taking photos.
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The London Film and Comic Con debuted in 2004 whereas San Diego Comic-Con International debuted in 1970.
The San Diego Comic-Con is a huge, sprawling, complex and crowded convention. Even for experienced convention go-ers, it can be overwhelming. For your first comic-con, it would probably be better to visit a different comic-con so you can have an exciting expereince without having to deal with the extra complications that are present at San Diego.
Comic Con India was created in 2011.
Chronicles of Comic Con - 2012 Kill Time at Comic Con - 1.3 was released on: USA: 7 October 2012
Chronicles of Comic Con - 2012 Comic Con Dos and Donts 1-1 was released on: USA: 10 July 2012
Chronicles of Comic Con - 2012 Kill Time at Comic Con 1-3 was released on: USA: 7 October 2012
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Central Canada Comic Con was created in 2006.
Big Apple Comic Con was created in 1996.
New York Comic Con was created in 2006.
How To Batman - 2009 How to Go to the San Diego Comic Con 2010 3-15 was released on: USA: 25 July 2010