IT: 6 Ways Bill Skarsgard Got Into Character

6. Creepy Movements

As if Pennywise's makeup, weapons, and hidden teeth aren't scary enough, Bill Skarsgard's performance included drooling, erratic running, leaps and, fittingly, dancing. This unique style of movement can be seen many times throughout the movie. Notably, after Freddie breaks his arm in the home of Pennywise, or "It," Skarsgard began to drool on the child during filming, creating an insanely creepy scene which illustrated the animalistic and sinister nature of the creature.

When Beverly Marsh is trapped in the lair of the demonic clown, It can be seen performing a signature dance, fulfilling the role of the dancing clown. An insane run straight into the camera is the last we see of bully Patrick Hock, who meets his end in the sewers while looking for his own victim. Pennywise is often seen leaping and transforming shape to murder his prey.

While a significant amount of work was done in post production CGI, a lot of Skarsgard's movements in the film were achieved with the help of a coach. In the same interview with Rolling Stone, Skarsgard explained that many of his runs were influenced by his brother's own crazy childish run.

"I don't know if you've seen kids run like this, but they move their arms way too fast, and it looks funny, really funny. And I just loved the way my brother ran as a kid. It was just out of sync. So I incorporated that into the character, and you get this really explosive effect."

This style of performing everyday activities amplified Skarsgard's portrayal, adding a twisted but fitting physicality.