<P> Sheev Palpatine , ( colloquial : Darth Sidious and The Emperor ) is a fictional character and one of the primary antagonists of the Star Wars franchise , mainly portrayed by Ian McDiarmid . In the original trilogy , he is depicted as the aged , pale - faced and cloaked Emperor of the Galactic Empire and the master of Darth Vader . In the prequel trilogy , he is portrayed as a charismatic Senator from Naboo who uses deception and political manipulation to rise to the position of Supreme Chancellor of the Galactic Republic , and then reorganizes the Republic into the Galactic Empire , with himself as Emperor . </P>
what was the emperor name in star wars
Sheev Palpatine Darth Sidious