What is the name of the villain in the movie Star Wars IV (4)?

The main villain in Star Wars IV (Episode 4) is Darth Vader. In Star Wars Darth Vader is the commander of the Imperial Forces.

The film was originally just called Star Wars as it was the original film in the series, first released back in 1977. But after the three prequel films in the series were made it became known as Star Wars Episode IV: A New Hope.

Since the original series of three films there have been three prequels and three more sequels made.

In the original Star Wars movie Darth Vader famously declares that he is Luke Skywalker’s father.