In the movie May December the story is about a young actress preparing for a role where the main character is based on a very similar woman to Mary Fualaau. The young actress is played by Natalie Portman, the woman she is preparing to play is played by Julianne Moore and her young husband is played by Charles Melton. The main thematic arc is for Portman's character to become so much like Moore's character, that she truly understands her. Which is in my opinion a very meta thing for Portman to do.
I was pleasantly surprised. There is a great ensemble cast in this film. Apart from Gosling there is Julianne Moore, Kevin Bacon, Emma Stone making it a discount La La Land, just to name a few. But I guess the coolest role of the movie was played by Jonah Bobo a 13 year old boy who... I won't spoil. But he rocks. Oh... And there is also Steve Carell.