The World's Greatest Sinner is a 1962 American drama film written, directed, and produced by, and starring Timothy Carey.

[2][3] Narrated by voice actor Paul Frees, the film focuses on a frustrated atheist[4] named Clarence Hilliard (later God Hilliard) who rises from insurance salesman to powerful figure, but faces consequences from the real God of the Bible; he alienates his family and friends with his increasing egomania and dictator-like presence.

With the encouragement of Alonzo, Clarence attracts the audiences with his new ideology: that an ordinary person who is now a superhuman being will live forever and become God.

Gradually gaining his followers, Clarence proclaims himself 'God Hilliard' and creates a religious cult known as the Eternal Man's Party.

God Hilliard forms a band at the venue and performs a rockabilly song, with a spoken motif, 'take my hand', and his outrageous stripping.

With the help of the manager, God Hilliard seeks out the nomination for President of the United States, leading a political party named after his cult.

The film cuts to scenes of God Hilliard seducing and kissing several women, including a 14-year-old minor, and his meeting with the followers of the Eternal Man's Party.

[5] During the course of this same interview with Steve Allen, Zappa discusses how he recorded the soundtrack for this film in the Little Theatre, located at Chaffey College in Alta Loma, California, along with the plethora of instruments used.

Excerpts of The World's Greatest Sinner's soundtrack were popular among certain bootleggers, and, subsequently, in 2009 were officially made available by Zappa Records on disc three of Beat the Boots III.

The film's title track and theme music, however, was eventually released by Donna Records as the B-side to the Baby Ray & The Ferns single "How's Your Bird?"

in April 1963,[6] with both songs being in turn later included on the compilation albums Rare Meat: The Early Works of Frank Zappa (1983) and Cucamonga (1998).

The influence of The World's Greatest Sinner on certain compositions in various later works, Mothers and non-Mothers, by Zappa can be felt in the reutilization of certain motifs from its soundtrack in such compositions as "Oh No" from Lumpy Gravy (1967) and Weasels Ripped My Flesh (1970), the second part of "Dog Breath" on Uncle Meat (1969), the Meat Light (2016) track "Blood Unit", and the Burnt Weeny Sandwich (1970) instrumentals "Overture To A Holiday In Berlin" and "Holiday In Berlin, Full-Blown".