Becoming Led Zeppelin, a film about the British band that dominated the music industry in the 1970s, was the most successful feature documentary at the US box office in 2025, taking over $10m. (Taylor Swift's The Official Release Party of a Showgirl grossed considerably more, with $34m, but as an album-promoting clipshow it is evidently in a different category.) Despite breaking up in 1980 after the death