The niece in Alfred Hitchcock’s *Shadow of a Doubt* is Charlie Newton, usually called Young Charlie.
Charlie lives with her family in the seemingly ordinary California town of Santa Rosa. She is initially delighted when her sophisticated Uncle Charlie visits, believing that his arrival will break the monotony of domestic life. Her admiration changes when she discovers clues linking him to the “Merry Widow” murders.
As Charlie investigates, she recognizes that her uncle is dangerous. He attempts to silence her through intimidation and an engineered car incident, then tries to kill her aboard a departing train. Charlie reverses the attack and causes his death, while the townspeople continue to honor him because they never learn the truth.
The character is easy to confuse with her uncle, Charles Oakley, who is also called Charlie. The film’s repeated use of the name deliberately emphasizes their close bond—and the disturbing resemblance between them.