3) Jack Gleeson in Game of Thrones (2011-2014)
Jack Gleeson was 18 years old when he played the cruel and power-hungry King Joffrey Baratheon in Game of Thrones. His youthful looks heightened the sinister nature of his character, as the actor was supposed to seem much older in George R.R. Martin's novels.
Gleeson's chilling performance received many positive reviews but also brought him unwanted attention from fans, who blurred fiction with reality. After his exit from the show in 2014, Gleeson retreated to focus on his studies and more theatre work.
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Edited by Zainab Shaikh