Bloody Birthday is a 1981 American slasher film directed by Ed Hunt, produced by Gerald T. Olson, and starring Susan Strasberg, José Ferrer, and Lori Lethin. Its plot follows a group of three children born on the same day during an eclipse who begin committing murders on their tenth birthdays.
In 1970, three children are born at the height of a total eclipse. Due to the sun and moon blocking Saturn, which controls emotions, they have become heartless killers ten years later, and are able to escape detection because of their youthful and innocent facades. A boy and his teenage sister become endangered when they stumble onto the bloody truth.