Russian Doll

Russian Doll is a 2001 Australian romantic comedy film directed by Stavros Kazantzidis and produced by Allanah Zitserman, starring Hugo Weaving, David Wenham and Natalia Novikova Set in and around the Bondi Beach area of Sydney, Australia, the film follows Harvey, a neurotic private investigator and wannabe crime writer, who gets asked to marry his best friend's mistress. The film was released on 6 April 2001.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.