The 17-year-old actress, who plays Sansa Stark in the hit fantasy Tv show, was enrolled at private school King's High in Warwick, England, but now studies with a private tutor instead.
She tells Interview magazine, "I found it really difficult when teachers talked down to me. I thought to myself, 'Shouldn't we be having an interesting conversation here?'"
However, the Brit, who was encouraged to audition for Game of Thrones by her drama teacher, has no regrets about her decision to quit school, adding, "I will be able to look back on my teen years as spent on a television set just having the biggest bunch of fun. At the moment, I can still treat acting as my favourite hobby since I don't have a mortgage to pay."