<http://schema.org/articleBody>
"Mark Gatiss has revealed that he has completed filming for his appearance in Game of Thrones. The Sherlock co-creator and star - who was unveiled as the latest name to join the HBO show earlier this week - said that he was &amp;quot;overwhelmed&amp;quot; by the response to his casting.   Speaking to CNN at Comic-Con, Gatiss explained that he had been keeping his involvement in season four of the hit show quiet for a while. &amp;quot;I&amp;#039;ve done my filming [and] I&amp;#039;m glad I didn&amp;#039;t tell anyone before this since it&amp;#039;s a big secret,&amp;quot; he said. &amp;quot;The announcement of [my casting] was obviously timed for Comic-Con and I&amp;#039;m rather overwhelmed with the reaction, honestly. &amp;quot;It&amp;#039;s a great show with so many brilliant people in it.&amp;quot; Gallery - Comic-Con 2013 in pictures:  Gatiss - who is known as well for his work on Doctor Who - also joked about coping with the devoted fanbase the fantasy drama has amassed. &amp;quot;My life is entirely composed of fan obsession - so this is just another one to add to it,&amp;quot; he said.  &amp;quot;It&amp;#039;s all a Venn diagram.&amp;quot; Gatiss has attended this year&amp;#039;s Comic-Con event in San Diego to promote the third series of Sherlock, but could potentially make a cameo at the Game of Thrones panel due to take place later today (July 19). Watch Gatiss speaking to Digital Spy at Comic-Con below:  "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/game-of-thrones/news/a499832/mark-gatiss-overwhelmed-by-reaction-to-game-of-thrones-casting/>