The Tom and Jerry cartoon has been a classic since it first came out in 1940. America's favorite rivals now take their cat-and-mouse game to the big screen – coming to theaters in 2021.

Most fairy tales have happy endings, but this one is a little sad, so get your handkerchiefs out. And as with most stories, there are lessons to be learned as well.

In Hans Christian Andersen's tale, a young mermaid comes of age and discovers the world above water.