When preparing to return to their roles almost 20 years after the prequel trilogy, both Ewan McGregor and Hayden Christensen have been brushing up on their characters. In an interview with Entertainment Weekly, McGregor said he watched through all nine main Star Wars movies to prepare, while Christensen went even further, following Anakin's extended adventures in both Clone Wars and Rebels animated shows.

"I watched [the Star Wars films] from start to finish," McGregor told EW. "All nine movies. Just to get back in that world." The Obi-Wan actor added that it was his first time watching the prequels since their initial release. "It was interesting to watch our films because I hadn't seen them since they came out, not at all. So it was cool to see and interesting to watch them and enjoy them without all of the noise that was around when they came out.

Christensen also watched through the films again, but revealed that he's gone even deeper into the Star Wars canon, getting through the animated shows Clone Wars and Rebels as well.