>> maisie williams: oh, gosh. i-- i've lost count.est kill count. >> cooper: williams was 12 when "game of thrones" started. she's now 22. this was her first acting job. >> williams: i didn't even want to be an actor. ( laughs ) i wanted to be a dancer. and then, my second audition was for "game of thrones," and then it all just-- >> cooper: there are actors all over the world right now listening to that, screaming. >> the things i do for love. >> cooper: george r.r. martin is the novelist behind this murder and magic. in 1996, he published the first in his series of books, called "a song of ice and fire." for years, hollywood pursued him, trying to turn his books into movies. >> george r.r. martin: their approach was inevitably to simplify. well, okay, these books are too big, we have to cut it all down. i didn't want it simplified. so i said, repeatedly, the-- the sexiest word in hollywood, "no." >> cooper: that's the sexiest word in hollywood? >> martin: but, no, i don't want to do it. until david and dan came along. >> that earlie