Lily Rabe, who plays Sarah's mom, and Hamish Linklater, who plays David's dad, are married in real life.
Colin Farrell made sandwiches for pregnant Margot Robbie after every day of shooting. He put them in her fridge so she had something to eat the next day.
"A Big Bold and Beautiful Journey" marks celebrated composer Joe Hisaishi's first score for a Hollywood film.
Sarah (Margot Robbie) accuses David of faking his accent. In real life, Robbie was faking an accent to play Sarah.
The screenplay was included in the 2020 edition of the Black List.