The Perfect Fool is an opera in one act with music and libretto by the English composer Gustav Holst.

[1] In the score, Holst pokes fun at the works of Verdi, Wagner's Parsifal[2] and Debussy.

In the opera, the part of the Fool consists of no singing and only one spoken word, "no."

[4] Although the opera did receive a live BBC broadcast a year after its premiere,[5] performed by the British National Opera Company and relayed from His Majesty's Theatre, London,[6][7] revivals of the work have been rare.

In 1995, Vernon Handley conducted a performance of the complete opera for the BBC, broadcast on 25 December.