How a low-budget Dublin busker film became a global, Oscar-winning musical phenomenon

How a low-budget Dublin busker film became a global, Oscar-winning musical phenomenon
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In short: Made for just €112,000 with a skeleton crew and no filming permits, the 2007 film Once defied industry expectations. By casting real-life musicians instead of actors and embracing an unscripted, raw aesthetic, director John Carney created a modern musical that captured hearts and eventually swept the Tony Awards.

The film's origins were modest, rooted in the collaboration between director John Carney and musicians Glen Hansard and Markéta Irglová. Originally, Carney envisioned actor Cillian Murphy for the lead role, but Murphy withdrew, citing concerns over his vocal range and the prospect of acting opposite a non-professional. Hansard, a musician who had only one previous acting credit, stepped in on the condition that the production remain intimate and low-budget. The resulting shoot lasted only 17 days, utilizing natural light and the homes of the cast to keep costs minimal.

The film's authenticity was bolstered by its guerrilla-style production. Dublin street scenes were filmed with long lenses to capture passersby who were often unaware they were being recorded, allowing the leads to relax and improvise. This approach extended to the music; the soundtrack featured songs written by Hansard and Irglová, including 'Falling Slowly,' which won the 2008 Academy Award for Best Original Song. The film's emotional resonance was partly attributed to its refusal to provide a conventional, tidy ending, a creative choice Hansard defended as essential to the power of cinema.

Once achieved significant commercial and critical success, grossing over $20 million worldwide. Its impact transcended the screen, leading to a successful Broadway adaptation that premiered in 2012. The stage production, which featured the cast as the orchestra, won eight Tony Awards, including Best Musical. Despite the intense chemistry between the leads during filming—which briefly mirrored their characters' romance in real life—the pair eventually parted ways, remaining close friends while continuing their musical partnership through The Swell Season.

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