In the ice cream scene, in order to challenge his father, Billy skipped the dinner and went directly to the dessert. It was an impromptu performance of Dustin Hoffman and Justin Henry. Director Robert Benton liked this paragraph very much, so he kept it in the movie.
Kate Jackson was originally scheduled to play Joanna Kramer. She admitted that her role in "Charlie's Angels" (Charlie's Angels, 1976) was the biggest hindrance to her acceptance of this role.
Dustin Hoffman personally experienced divorce and contributed a lot of his feelings and dialogues in the movie. Director Robert Benton wanted to add his name to the list of screenwriters, but Dustin refused.
Meryl Streep told the director and screenwriter Robert Benton that she was very dissatisfied with the lines of the court scene in the script. According to Robert's suggestion, Streep wrote her own lines.
At 1:07:07 of the movie, after learning that the application was successful, at the company’s Christmas party, Dustin Hoffman unexpectedly kissed the woman (blonde and white suit), her name is Ingeborg S rensen , A playmate of a former Miss Norway and Playboy.
Meryl Streep initially played Todd's one-night stand lover (company colleague Phyllis Bernard), and eventually the role was played by Jobes William. When Kate Jackson was totally unable to identify and accept the role of Joanna, Streep was asked to replace her.
