With that in mind, here's a look at 10 of the happiest movies ever made. Good Will Hunting. ... Forrest Gump. ... Despicable Me. ... The Sound of Music. ... It's a Wonderful Life. ... Singin' in the Rain. 9 to 5. ... Inside Out. All of us are guided by our emotions, but never has that been so clearly illustrated as in this charming animated movie. More items... Jun 2, 2017