Heidi is a 1993 American two-part, three-hour television miniseries based on the classic Swiss 1881 novel of the same name by Johanna Spyri, which has sold over 50 million copies and has been adapted for film and television nearly 20 times. Heidi originally aired on the Disney Channel on July 18 and 19, 1993, and stars Noley Thornton in the title role.