Kym Karath, born Anthea Kym Karath in Los Angeles on August 4, 1958, is an American actress, known primarily for her career as a child actress in the 1960s. Her most iconic and universally recognized role is that of Gretl von Trapp, the youngest child of the von Trapp family, in the celebrated musical film *The Sound of Music* (1965), directed by Robert Wise. Prior to this worldwide success, she had already acted alongside prominent actors in films such as *The Thrill of It All* (1963) with Doris Day and *Good Neighbor Sam* (1964) with Jack Lemmon. After her childhood years, her activity in the entertainment industry diminished significantly. She attended the University of Southern California, graduating with a degree in humanities. Her primary recognition remains inextricably linked to the success and cultural prestige of *The Sound of Music*, a film that won five Academy Awards, including Best Picture. In subsequent years, she made occasional television appearances and participated in several reunions with the cast of the film that made her famous worldwide.