The Wicker Man
This 1973 British horror film follows Sgt. Neil Howie (Edward Woodward), who has been sent to a British isle known for its pagan rituals in order to investigate the disappearance of a young girl. As it turns out, there is no missing girl, and the residents of the island lured the officer there to use him as a human sacrifice in their ceremony, where he is burned alive inside of a gigantic "wicker man" statue.
Us
The Wilson family's beach vacation takes a violent turn when they find that they are being stalked by their own murderous clones. Adelaide (Lupita Nyong'o), the Wilson matriarch, is determined to keep her skeletons in the closet—until it is revealed that she is a doppelgänger named Red from the underground world. Red abducted the real Adelaide Wilson decades ago and assumed her identity, leaving Adelaide to wander aimlessly among Tethered.