L.B. Jeffries, often referred to as "Jeff," is a fictional character from the classic film Rear Window, directed by Alfred Hitchcock. He is portrayed by actor James Stewart and is a professional photographer who becomes confined to his apartment due to a broken leg. While recovering, he spends his time observing his neighbors through his window. As he watches their daily lives, Jeff begins to suspect that one of his neighbors may have committed a crime. This leads him into a suspenseful investigation, showcasing themes of voyeurism and morality. Jeff's character embodies curiosity and the consequences of looking too closely into others' lives.