"Star Wars Rebels" will kick off its second season June 20 on Disney XD with a special one-hour movie, "The Siege of Lothal," screened earlier this month at Star Wars Celebration. However, fans will have to wait until fall for additional episodes.

Starring Freddie Prinze Jr. as Kanan, Vanessa Marshall as Hera, Tiya Sircar as Sabine, Steve Blum as Zeb and Taylor Gray as Ezra, the animated series is set between the events of "Revenge of the Sith" and "A New Hope," just as a rebellion begins to rise up against the expanding Empire.

As revealed in the first trailer, Season 2 will feature the return of Darth Vader and Ahsoka Tano in recurring appearances, with actors James Earl Jones and Ashlecky Eckstein reprising their voice roles. In addition, "Clone Wars" veteran Dee Bradley Baker will once again play Captain Rex, Commander Wolffe and Gregor.

"Star Wars Rebels: The Siege of Lothal" premieres Saturday, June 20, at 9 p.m. ET/PT on Disney XD.