Scott portrays Georgie with a range of almost all emotions humans can experience but acts exactly like a kid would in his situation- within the first six to eight minutes of the film. Bill Skarsgård is one minute a goofy (albeit terrifying from the start) clown to otherworldly and menacing, at least to start anyway. As the movie progresses he talks a little less as Pennywise and relies on extremely physical acting. More on that in a minute. We can see the pain of losing his brother through Jaeden Lieberher’s acting (and expressive eyes) as Bill Denbrough through the entire movie. He’s obviously the leader of the group in every scene he’s in with them, and the other actors understand that.
Richie as portrayed by Finn Wolfhard (of Stranger Things fame) is the funniest part of the movie. Sophia Lillis is an endearing, sweet, and tormented Beverly Marsh; all praise to her. The rest of the Loser’s Club are excellent and endearing young actors/kids through Jeremy Ray Taylor (Ben Hanscom), Chosen Jacobs (Mike Hanlon), Jack Dylan Grazer (Eddie Kaspbrak), and Wyatt Oleff (Stanley Uris).
The movie is a constant assault of terrifying images. All those scary scenes in the trailer? They are all extended far, far past what the trailer reveals. These are not jump scares. Pennywise doesn’t just scare the kids by saying BOO and then buggering off to do his own thing immediately afterwards. He sticks around until they escape- or don’t. Director of Photography Chung-hoon Chung focuses on the kids, and then has a lingering, chaotic shot of Pennywise in all his glory. Chung also has lingering shots of certain parts of the background, after the characters have left, implying that Pennywise is still in the area watching. All of the special effects and visual effects are very well done. Worried that the house on Neibolt St. won’t look scary enough? Don’t be. The set decorators do a fantastic job. Reddit’s r/AbandonedPorn will be happy.
As for the violence; it is nearly constant. Not gory either, just really bloody. You don’t often see the intestines, hearts, or other viscera in this movie. The longest lull in the pace (not a crime at all) actually brings the Losers together and is only, maybe about ten minutes long. During these lulls the plot still progresses. As does the tension, because with Chung’s cinematography, everything in this movie is menacing. There are also a lot of “Fuck yeah!” moments because when the Losers get their shit straight, individually or otherwise, they (and the audience) have been through so much there can be no other reaction. Notably from Ben Hanscom (a really sweet moment), Beverly Marsh (a fuck yeah, you go girl! moment), and Mike Hanlon (a cathartically violent moment).
For a final note, the “train” scene from the book is not even hinted at in the movie, so don’t worry. Really, really uncomfortable moments are provided by Beverly Marsh’s father.
In conclusion: It is a chaotic, bloody (but not TOO bloody) assault on the visual senses, interspersed with pockets of genuine hilarity, friendship, young love, and emotional healing.
P.S.: Professional clowns are a wonderful part of childhood. They are not scary and should be respected as such. They are fun, make kids smile or laugh, and work hard to be where they are. So please, do not take this movie as a sign that professional clowns are evil. Pennywise, Bob Gray, It; the creature itself, in whatever form, is not even remotely human. Just keep that in mind.