In 1989, Hahn made his first mark as Producer for Disney and Amblin Entertainment's first Roger Rabbit short, Tummy Trouble, producing along with Steven Spielberg, Kathleen Kennedy, and Frank Marshall. He then became the Producer for the benchmark animated feature, 1991's Beauty and the Beast, which was the first animated film to be nominated for the Oscar for Best Picture. His next production, 1994's The Lion King, set worldwide box office records for an animated film and quickly became the highest grossing traditionally animated film in history. In 1996 he produced The Hunchback of Notre Dame, and in 2000 he was an executive Producer on The Emperor's New Groove.