Florian Zeller on ‘Bunker’ and Casting Real-Life Couple Penélope Cruz and Javier Bardem

Florian Zeller’s Bunker explores a marriage in crisis through the real-life partnership of Penélope Cruz and Javier Bardem, who play a married couple whose relationship begins to fracture over ambition, morality and the uncertain future. Inspired in part by Stanley Kubrick’s Eyes Wide Shut, Zeller was drawn to the idea of blurring the line between fiction and reality by casting the longtime partners as husband and wife. The director says the idea of seeing Cruz and Bardem together on screen came before the story itself, with their real-life relationship becoming an essential part of the film’s DNA.

Bardem plays Miguel, a successful architect offered a lucrative commission to design a secret survivalist bunker for a reclusive tech billionaire, played by Paul Dano. His wife Sofia, portrayed by Cruz, becomes increasingly troubled by the project and what it reveals about her husband’s values, ultimately forcing the couple to confront the foundations of their 17-year marriage. The film uses the bunker as a metaphor for contemporary anxieties surrounding extreme wealth, individualism, environmental concerns and social inequality, with Zeller describing the story as an exploration of these issues through the intimate experience of a couple.

Zeller also designed the film’s visual world to mirror the couple’s psychological unraveling. Miguel and Sofia’s modern home was constructed on a soundstage in Madrid, initially appearing open and filled with glass before gradually taking on the claustrophobic qualities of a bunker. The production itself was similarly isolating, with the cast and crew working for weeks in a studio without natural light. Zeller says this environment helped create the film’s atmosphere of paranoia and confinement, while carefully placed visual and poetic details — including references to The Odyssey and the Sirens incorporated into the score — add further layers to the story.

The central performances remain the film’s backbone, with Zeller particularly interested in bringing Cruz and Bardem closer to the emotional truth of their relationship without making the film autobiographical. Cruz was the first to read the screenplay and asked whether she would still be offered the role if Bardem declined, underscoring their desire to remain independent artists. Zeller ultimately says he likely would not have made Bunker without both actors, whose real-life partnership allowed the film to explore a marriage under pressure with an unusual degree of authenticity and emotional intensity.

Read the whole article on Variety.