A Night at the Opera is the fourth studio album by the British rock band Queen, originally released in November 1975. Named after the Marx Brothers film, it was famously the most expensive album ever recorded at the time of its release. Incorporating a complex mix of progressive rock, pop, heavy metal, music hall, and operatic vocals, the album produced timeless classics such as "You're My Best Friend" and the legendary masterpiece "Bohemian Rhapsody," cementing Queen's place in rock history.