Joshua also known as The Devils Child is a 2007 American psychological dramathriller horror film about an affluent young Manhattan family and how they are torn apart by the increasingly sadistic behavior of their disturbed son, Joshua. The film was directed and cowritten by George Ratliff, and stars Sam Rockwell, Vera Farmiga and Jacob Kogan. It was released on July 6, 2007 in the United States by Fox Searchlight Pictures.
Joshua gravitates toward his aesthete uncle Ned Dallas Roberts as a close friend, but distances himself from his immediate kin, particularly following the birth of his sister Lilly. As the days pass, bizarre events transpire as the mood at the house regresses from healthy and happy to strange and disorienting. As the babys whines drive an already strained Abby to the point of a nervous breakdown, Joshua devolves from eccentric to downright sociopathic behavior.Joshua causes a fight between his mother who is Jewish, but nonreligious and paternal grandmother who is an Evangelical Christian and who constantly proselytizes Joshua when he tells his parents he wants to become a Christian. Abby gets very angry and swears at the grandmother, telling her to leave her house immediately. Joshua later convinces his mother to join him in a game of hideandseek. As Abby counts to fifty, Joshua takes his baby sister from her crib to hide with him, causing his mother to panic and pass out while searching for them in the empty penthouse above them, before he puts the baby back into the crib to make it look as though his mother was hallucinating the entire incident. ........
Source: Wikipedia