FACT OF THE DAY: Happy Birthday to ‘The Little Mermaid’! The beloved Disney film was released 29 years ago! Twenty nine years and two days to be exact, November 13, 1989. The animated film follows the story of 16 year old mermaid Ariel, who becomes human for 3 days and then falls in love with a human prince. The Little Mermaid featured such hit songs as Under the Sea, Kiss the Girl, and Part of Your World.