Disney and its Pixar Animation have just officially announced that they will create a sequel to their 2003 Oscar-winning hit “Finding Nemo” — and that they’ve landed Ellen DeGeneres to reprise her role voicing Dory. The new film, “Finding Dory,” is scheduled for a November 2015 release and will be helmed by “Nemo” director Andrew Stanton. “I have waited for this day for a long, long, long, long, long time,” the Emmy-winning DeGeneres said in a statement. “I’m not mad it took this long. I know the people at Pixar were busy creating ‘Toy Story 16.’ ” In her kidding, DeGeneres touches on the fact that Pixar has upped its number of sequels in recent years, including 2011’s “Cars 2” and this summer’s “Monsters University.” In “Finding Nemo,” which was a critical and commercial success, Dory was the upbeat, forgetful fish who helped Marlin the clownfish (voiced by Albert Brooks) find his kidnapped, special-finned son Nemo via the Australian current. The sequel reportedly will be set one year after “Nemo” along the California coastline. Disney says “Dory” will feature both old and new characters; the studio did not indicate whether Brooks would return to voice Marlin. DeGeneres, who has focused primarily on her TV talk show since “Nemo,” received the Mark Twain Prize for American Humor last October at the Kennedy Center.