Fan Casting Abigail in Remake of The Haunting of Hill House

Abigail is the daughter of Horace and Clara Dudley. Her parents predominantly keep her at home and do not want her at Hill House. After the Crain family move in, Abigail begins meeting Luke at the property to play with him. His siblings call her his 'imaginary friend,' as they have never seen her, though in fact she is the daughter of the Dudley's.