The Magic Mirror on the Wall is a magical object that houses an all-knowing slave of the Queen in the 1937 animated feature Snow White and the Seven Dwarfs. The Queen would consult this Mirror every day asking the identity of the fairest one of all. The Mirror would always reply that this refers to the Queen up until the events of the film, which are kicked off when the Mirror informs the Queen that Snow White had surpassed her in fairness. The Mirror is consulted one more time later in the film, with the same response and a tip to the vengeful Queen that Snow White still lives.
The Mirror is also featured in many Disney Park attractions and shows, such as Snow White's Scary Adventures, Fantasmic!, Wishes, Cinderella Castle Mystery Tour, and Once Upon a Time Adventure, as a servant either of the Queen or of the forces of evil.