The Jacqueline Kennedy Onassis School at American Ballet Theatre (ABT/JKO School) is the associate school of American Ballet Theatre located within the Flatiron District of Manhattan, New York City. The school comprises a "Children's Division" for ages 4–12, a "Pre-Professional Division" for ages 12–18, and the preparatory program "Studio Company" for ages 16–20. It was established in 2004 and named in honor of the late, previous First Lady of the United States, Jacqueline Kennedy Onassis, who served on ABT's Board of Trustees as "Honorary Chairman Emerita" for many years prior to her death. Besides its parent company, graduates of JKO have found employment in various companies, such as National Ballet of Canada, The Royal Ballet, Joffrey Ballet and Dutch National Ballet.