The Worst Person in the World is a 2021 romantic comedy-drama film directed by Joachim Trier, who co-wrote the screenplay with Eskil Vogt. It is the third film in the director's Oslo trilogy, following Reprise (2006) and Oslo, August 31st (2011).

Reprise is a 2006 Norwegian comedy-drama film directed by Joachim Trier and co-written, over the course of five years, by Trier and Eskil Vogt. It is Trier's first feature-length film and the first, along with Oslo, August 31st (2011) and The Worst Person in the World (2021), in the director's Oslo trilogy.