Luke Skywalker is a fictional character and the main protagonist of the original film trilogy of the Star Wars franchise, where he is portrayed by Mark Hamill. He is introduced in Star Wars Episode IV: A New Hope, in which he is forced to leave home, and finds himself apprenticed to the Jedi master Obi-Wan Kenobi. He soon becomes an important figure in the Rebel Alliance, leading the struggle against the Galactic Empire. As the son of former Queen of Naboo and Republic Senator Padmé Amidala and her husband, Anakin Skywalker—a fallen Jedi also known as the Sith Lord Darth Vader—Luke is heir to a family deeply powerful in the Force. He is also the fraternal twin brother of Princess Leia Organa of the planet Alderaan, foster daughter of Senator Bail Organa and a leader of the Rebellion who recruited her brother into the cause. The Expanded Universe depicts him as a powerful Jedi Master and eventually the Grand Master of the New Jedi Order, as well as the father of Ben Skywalker, maternal uncle of Jacen Solo and ancestor of Cade Skywalker.