Marriage Story is partly but not precisely based upon Noah Baumbach‘s divorce from Jennifer Jason Leigh, which occured between late 2010 and 2013. There are similarities and differences between the film and real life. Baumbach and JJL’s son Rohmer was born on 3.17.10. Leigh filed for divorce on 11.15.10, citing irreconcilable differences. The divorce was finalized in September 2013. That’s all I really know.
Some feel that Baumbach slightly tipped the sympathy scales in favor of his stand-in character, Charlie (Adam Driver), and a bit against the JJL stand-in, Nicole (Scarlett Johansson). I wouldn’t know much about that either.
As for any alleged Annie Hall analogy, Alvy Singer (Woody Allen) sweetened what happened between he and Annie (Diane Keaton) in his stage play. Baumbach’s film, on the other hand, indicates a less robust aftermath for Charlie than the one Baumbach and Greta Gerwig, his present partner, are currently enjoying. That’s all you can really say about any of this.