Robert Plant has offered rare permission for a new indie film to use Led Zeppelin songs, personally approving the use of the music days before its premiere.

When Led Zeppelin released their untitled fourth record back in 1971, the event was preceded by the birth of American filmmaker Gabriela Cowperthwaite. Close to 50 years later, both Led Zeppelin and Cowperthwaite have come together thanks to the latter’s new film, The Friend.

Based upon an 2015 article by Matthew TeagueThe Friend retells the real-life cancer battle of Nicole Teague and how close friend Dane moved in with them to look after their family in Nicole’s final months.

With Nicole being noted as a huge fan of Led Zeppelin, Cowperthwaite found it important to ensure that the band’s influence and music where included in the final product.

However, as anyone who knows about music rights could tell you, including any music from Led Zeppelin in the film would be an immensely costly process.

Check out Led Zeppelin’s ‘Ramble On’:

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As Deadline reports, Gabriela Cowperthwaite soon discovered that gaining permission to use Led Zeppelin’s music in the finished product would have taken up approximately a third of its $10 million budget.

While backup music was written into the film, a last-minute attempt from executive producer Ridley Scott helped to get the desired tunes over the line, penning a personal letter to surviving members Robert Plant, Jimmy Page, and John Paul Jones.