Bill Skarsgård
Pennywise, the creepy clown who terrorized children in the 2017 film adaptation of Stephen King's It, is one of the scariest roles out there. Skarsgård had a hard time putting on the clown suit and was relieved when filming wrapped. He told Entertainment Weekly that he developed a "destructive relationship" with Pennywise, finding it tiring to enter the mindset of a killer clown. However, Skarsgård later said that Pennywise remained with him long after he left the scene.
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