If you were to pin me into a corner and ask for my favorite Bob Montgomery films, I'd have to admit a fondness for Another Language. Released in 1933, this MGM gem offers a cast that fits together perfectly to tell the story of the Hallam family - right after the honeymoon.
I recommend checking out the New York Times review of the film's showing at the Capitol Theater in NYC. According to the newspaper, the film was quite true to the play by Rose Franken.
And from the NY Times review, one of those "wish I was there" moments, a live presentation at the Capitol:
Robert Montgomery and Irene Purcell performing in a short scene from the second act of Noel Coward's "Private Lives" is the feature of the stage show at the Capitol Theatre this week and, by the way Mr. Montgomery and Miss Purcell have at each other, one would assume that they mean to emulate Mr. Coward and Miss Gertrude Lawrence in physical violence if not in histrionic accomplishment.
Just an aside, Irene Purcell starred in The Man In Possession with Bob in 1931.