Question: Which actor played the physically abusive teacher in a 2001 highest grossing film?
Sentence (from "Kim Kwang-kyu (actor)"): He made his acting debut in 1999 in "Dr. K", and its director fellow Busan native Kwak Kyung-taek later cast him in a small but memorable role as a physically abusive teacher in the 2001 box-office hit "Friend".
Relevant evidence: Yes