Game of Thrones is a beloved fantasy show with a very rabid fan base. Rarely does a TV show inspire such loyalty or hatred for the characters in its narrative. The casting is a big part of this and as any fans of the book will testify, overall the show has done a great job with this. Obviously this wasn't the first role for many of the actors and some of their past performances can seem rather jarring when thinking of them parallel to their character in the adaptation R.R. Martin's novels. The first thing to note in writing this is that I use the term 'ruin' loosely. Game of Thrones is a serious, dark fantasy and it's just humorous to dig into the past of its actors and find roles that undermine their current character when put side by side. A lot of the actors who portray our favourite Thrones characters have varied careers to say the least. I tried to get a good cross section of the cast into here and I was genuinely surprised by some of the things I found out when researching the feature. From absurd comedic roles for serious thespians to young actors who had to star in Syfy dross before reaching the lofty heights of HBO, you may know of some of these roles but I'm sure some will surprise you. Minor plot SPOILERS for Game of Thrones and the other films the actors have featured in.