In Star Wars: The Empire Strikes Back, what does Darth Vader reveal about Luke's father?

In Star Wars: The Empire Strikes Back, Darth Vader reveals Luke Skywalker's parentage by saying, “I am your father.”

The revelation occurs during Vader's duel with Luke on Cloud City. Vader first tells Luke that Obi-Wan Kenobi never told him what happened to his father, then identifies himself as Anakin Skywalker, Luke's father.

The 1980 film was directed by Irvin Kershner and written by Leigh Brackett and Lawrence Kasdan from George Lucas's story. Its family revelation became one of the most influential spoilers in movie history.

A common mix-up is adding “Luke” to the beginning of the quotation. Vader does not say “Luke, I am your father” in the film. The exact spoken line begins with “No,” followed by “I am your father.”