Cowardly Lion in The Wonderful Wizard of Oz. The advent of moving pictures saw the continued presence of lion symbolism; one of the most iconic and widely recognised lions is Leo the Lion, the mascot for Metro-Goldwyn-Mayer (MGM) studios, which has been in use since the 1920s.[198] The 1960s saw the appearance of what is possibly the most famous lioness, the Kenyan animal Elsa in the movie Born Free, based on the true-life international bestselling book of the same title. The lion's role as King of the Beasts has been used in cartoons, from the 1950s manga which gave rise to the first Japanese colour TV animation series, Kimba the White Lion, Leonardo Lion of King Leonardo and his Short Subjects, both from the 1960s, up to the 1994 Disney animated feature film The Lion King, which also featured the popular song "The Lion Sleeps Tonight" in its soundtrack. A lion appears on the South African 50-Rand banknotes (see South African rand).