The Mandela Effect is a 2019 science fiction horror film written and directed by David Guy Levy, starring Charlie Hofheimer as a father grieving for the loss of his daughter. The character becomes obsessed with facts and events that many people remember incorrectly. Aleksa Palladino plays his also-grieving wife, while Robin Lord Taylor plays his best friend and brother-in-law, and Clarke Peters plays a washed-up scientist.
The Mandela Effect premiered at the Other Worlds Film Festival in October 2019, and was released in the United States in December, by Gravitas Ventures.
(Summary from Wikipedia)