The Swell Season is a musical duo formed by Glen Hansard, an Irish singer-songwriter, and Markéta Irglová, a Czech musician. They gained widespread recognition for their work on the soundtrack of the 2007 film Once, which features their heartfelt songs and showcases their unique blend of folk and rock music. Their collaboration highlights emotional storytelling through music, resonating with audiences worldwide. The duo released several albums, including their self-titled debut in 2006 and Strict Joy in 2009. Their sound is characterized by rich harmonies, acoustic instrumentation, and poignant lyrics, reflecting themes of love, loss, and hope. The Swell Season continues to be celebrated for their contributions to contemporary music.