Woody Allen's Annie Hall has been a key reference for Trier and Vogt throughout their career, and they bring the same sensibility for an inventive rom-com to The Worst Person in the World. The dress that Julie wears at the beginning of the film is actually modeled after a dress Annie Hall wears in that film. When preparing to write the film, Trier and Vogt revisited films such as The Philadelphia Story, Holiday, Eat Pray Love, and Paul Mazursky's films. Trier also always has Bergman, Antonioni, Bresson, and Ozu on his mind, and has talked about them in previous interviews.