Margot Robbie attended the New York premiere of A Big Bold Beautiful Journey on Monday night, posing on the red carpet alongside co-star Colin Farrell as the film prepares for its Sept. 19 release.

Robbie, 35, wore a black-and-white, corset-style ensemble with a plunging black overdress and her hair pulled back. She accessorized with silver earrings; Farrell arrived in a light-gray suit.

A Big Bold Beautiful Journey follows Sarah (Robbie) and David (Farrell), two strangers who meet at a mutual friend’s wedding and are swept into an otherworldly adventure that allows them to relive pivotal moments from their pasts. Sony Pictures released the first trailer in June, introducing scenes in which the characters discover a mysterious door in the woods that serves as a portal to memories of their earlier lives.

The trailer presents a mix of romantic and fantastical elements, including moments of unrequited love, loss and reconnection. Lines in the preview include David’s observation that some of the most beautiful places can make a person feel alone and a closing reflection that, regardless of life stage, people need someone to share it with. Early footage prompted positive audience response online, with some social-media users describing the trailer in enthusiastic terms.

The film’s cast includes Phoebe Waller-Bridge, Hamish Linklater, Lily Rabe, Billy Magnussen and Jodie Turner-Smith. A Big Bold Beautiful Journey will open in theaters Sept. 19.

Robbie’s appearance at Monday’s event comes less than a year after she took time away from acting following the birth of her son. Speaking previously about motherhood, Robbie said it is difficult to explain to people who do not have children and summarized the experience simply: “It’s the best.”

Publicity for the film has focused on both its lead performances and its premise, which combines elements of romantic drama with speculative or fantastical devices. Sony’s marketing has highlighted the chemistry between Robbie and Farrell and the film’s exploration of memory and identity as selling points for audiences.

At the premiere, photographers captured Robbie and Farrell together on the carpet; promotional appearances and press events are scheduled in the coming days ahead of the nationwide release. Box-office tracking and critical reviews will begin to form a fuller picture of the film’s reception once critics’ screenings and public showings commence.

Tickets for A Big Bold Beautiful Journey went on sale in advance of the opening, and studio materials encourage audiences to view the film as a character-driven exploration of love, loss and the ways personal history shapes relationships.