Luke, I am your father

One of the most famous scenes in all of cinema occurs in the 1980 science fiction movie The Empire Strikes Back, the second in the original Star Wars trilogy. The scene in question, is where villain Darth Vader reveals to hero Luke Skywalker that he did not kill his father, but rather he is his father.

Many remember Darth Vader's famous line as "Luke, I am your father". In reality, he says "No, I am your father".

Possible explanations

 * Since Darth Vader was already talking to Luke, it would not make much sense for him to say Luke's name.
 * Many people say the Luke line whilst doing a Darth Vader impression. Saying "Luke, I am your father" simply sounds better while doing the impression, plus it adds context. Additionally, people instantly know what movie you're referencing. The widespread popularity of the line led to more people adopting Luke into it, therefore leading to countless people believing that "Luke, I am your father" was the original line all along.
 * Some videos on Youtube display VHS rips of the scene, one particular video features Vader saying the "Luke, I am your father" line, instead of the original quote. Many people used this as proof of the Mandela Effect, though it was later revealed that an audio glitch made it sound like Vader was saying Luke. (Many people say the audio glitch was too "perfectly timed", but the audio glitch is quite easy to hear and is a plausible explanation). Later, it was revealed that the video was flat out fake, with the audio of the audience "reactions" taken from another video, where they were reacting to the ending of the film Avengers: Infinity War.
 * The pop culture website TV Tropes named the trope for when two characters are revealed to be parent and child "Luke, I am Your Father", which may have caused users of the site to misremember the quote.