After winning an Oscar for playing the Queen of England in “The Favourite,” the very British Olivia Colman proves she can be just as good with a heartland American accent in the new film “Them That Follow.”

She leads the cast of the thriller that premiered at Sundance and is set deep in the heart of Appalachia about a group of worshippers who handle deadly snakes as a way of becoming cleansed before God. But as the pastor’s daughter prepares for her wedding day under Colman’s watchful eye, a dangerous secret is unearthed, and the daughter is forced to confront the deadly tradition of her father’s church.

“When the devil creeps in, you need someone to see the truth even when you don’t,” Colman, who is really from Norwich, England, says in the trailer.

Also Read: 'Them That Follow' Film Review: Talented Cast Exposes the Venom in Old-Time Religion

“Them That Follow” stars Colman alongside Walton Goggins, Alice Englert, Kaitlyn Dever, Jim Gaffigan, Thomas Mann and Lewis Pullman. The film from directors Britt Poulton and Dan Madison Savage was a nominee for the Dramatic Prize at Sundance this past year and was then scooped up by 1091.

“Them That Follow” opens Aug. 2 in theaters. The chilling first trailer for the film might make you queasy if you’re afraid of snakes, but you can watch it above.

81 Sundance Portraits From A to Z: Awkwafina to Zach Galifianakis (Exclusive Photos)

Awkwafina, "The Farewell"

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Demi Moore, "Corporate Animals"

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Ed Helms, "Corporate Animals"

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Hilary Swank, "I Am Mother"

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Clara Rugaard-Larsen, "I Am Mother"

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Director Grant Sputore, "I Am Mother"

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Director Sacha Jenkina and RZA, "Wu Tang Clan: Of Mics and Men"

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Peter Sarsgaard, "The Sound of Silence"

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Tony Revolori, "The Sound of Silence"

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Comedian Reggie Watts

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Zach Galifianakis, "The Sunlit Night"

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Jenny Slate, "The Sunlit Night"

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Storm Reid, "Relive"

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David Oyelowo, "Relive"

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Director Jacob Estes, "Relive"

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John Lithgow, "The Tomorrow Man"

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Blythe Danner, "The Tomorrow Man"

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Director Noble Jones, "The Tomorrow Man"

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Annette Bening, "The Report"

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Jon Hamm, "The Report"

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Maura Tierney, "The Report"

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Director Scott Z. Burns, "The Report"

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Danielle Brooks and director Chinonye Chukwu, "Clemency"

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Alfre Woodard, "Clemency"

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Naomi Watts, Tim Roth and Kelvin Harrison Jr., "Luce"

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Jennifer Ehle, "The Wolf Hour"

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Producer Cameron Crowe, "David Crosby: Remember My Name"

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David Crosby, "David Crosby: Remember My Name"

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Director AJ Eaton, "David Crosby: Remember My Name"

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Director Ryan White, "Dr. Ruth"

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"Troop Zero" directors Bert & Bertie and actress Mckenna Grace

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Director Alma Ha'rel, "Honey Boy"

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Byron Byers, "Honey Boy"

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Noah Jupe, "Honey Boy"

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Clifton Collins, "Honey Boy"

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Haley Joel Osment, director Joe Berlinger, Angela Sarafyan and Brandon Trost, "Extremely Wicked, Shockingly Evil and Vile"

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Director Matt Tyrnauer, "Where's My Roy Cohn?"

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Creator Richie Mehta, "Delhi Crime Story"

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Aisling Franciosi, "The Nightingale"

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Gina Torres, "Selah and the Spades"

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Lovie Simone and Celeste O'Connor, "Selah and the Spades"

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Jharrel Jerome, "Selah and the Spades"

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Wendy McLendon-Covey, "Imaginary Order"

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Max Burkholder, "Imaginary Order"

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Director Debra Eisenstadt, "Imaginary Order"

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Director Garret Price, "Love Antosha"

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Jim Cummings, "Greener Grass"

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Director Alice Waddington and Danielle Macdonald, "Paradise Hills"

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Jim Gaffigan, "Light from Light"

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Marin Ireland, "Light from Light"

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Josh Wiggins, "Light from Light"

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Director Penny Lane, "Hail Satan"

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Alex Holmes and Tracy Edwards, "Maiden"

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Jehane Noujaim and Karim Amer, "The Great Hack"

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Chris O'Dowd, "State of the Union"

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Florence Pugh, "Fighting With My Family"

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Lena Headey, "Fighting With My Family"

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Jack Lowden, "Fighting With My Family"

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WWE Superstar Paige, also known as Saraya-Jade Bevis, "Fighting With My Family"

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Nick Frost, "Fighting With My Family"

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Writer-director Stephen Merchant, "Fighting With My Family"

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Rachel Lear, "Knock Down the House"

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Alia Shawkat, "Animals"

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Holliday Grainger, "Animals"

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Director Sophie Hyde, "Animals"

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Director Stanley Nelson, "Miles Davis: Birth of the Cool"

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Rahaf, "Dunya's Day"

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Director Raed Alsemari, "Dunya's Day"

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Sara Balghonaim, "Dunya's Day"

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Sam Richardson, "Bootstrapped"

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RJ Mitte, Beau Mirchoff, Tyler Posey, director Gregg Araki, Avan Jogia, "Apocalypse Now"

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Karley Sclortino, Roxanne Mesquida, Kelli Berglund, "Now Apocalypse"

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Bobbi Salvor Menuez, "Adam"

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Director Rhys Ernst, "Adam"

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Nicholas Alexander, "Adam"

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Riley Keough, "The Lodge"

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Lia McHugh, "The Lodge"

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Directors Severin Fiala and Veronika Franz, "The Lodge"

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Akili McDowell, "David Makes Man"

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Writer-executive producer Tarell Alvin McCraney, "David Makes Man"

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