Judith Barsi played the role of Ducky, one of the original five main characters in "The Land Before Time" that joined Littlefoot on his journey. Ducky was one of the more positive and outgoing characters in the film, and was noted for her cheerful personality and catchphrase of "yup-yup-yup!"
Ducky's memorable appearance in the film was due in no small part to the performance of Barsi, who, though only 10 years old, had already acted in around 72 commercials as well as several episodes of television shows such as "Punky Brewster," and two feature films. She was also pulling in an estimated $100,000 a year by the time she entered fourth grade, according to the Los Angeles Times.
Judith was not an up-and-coming actor or on the verge of a breakout: she had broken out already and seemed poised to have a long, successful career ahead of her. Tragically, that all came to a screeching halt on July 28, 1988, when Judith was murdered by her own father, József Barsi, just a few months before the theatrical release of "The Land Before Time."