The Prime Minister wants Britons to celebrate the Royal Wedding with bunting and street parties.
But it has emerged that it is the skills of an assistant that have enabled his opinions to be made public.
He is reported to be urging people to fight the red tape and bureaucrats who threaten to dampen the day with their rules and regulations.
A statement from his office read: "To those councils that are asking small groups of neighbours for licences, insurance and other bureaucracy my message is clear: Don't interfere. Don't get in the way and don't make problems where there are none."
But EIF News & Features has obtained a tape of a rant which was transcribed into a coherent statement by a secretary.
Mr Cameron was apparently enjoying a quiet moment and a few drinks with close aides when the subject of council red tape spoiling party plans came up.
"Faaahkin bashtads! S'a faahkin royal faaaahkin wedding... hic. An' she'sh a belter that Kate, innit? Phwoaarr!
"Wasa faaaakin problem wi thoshe faaahkin council dickeds? Hic. Shtop bein' such a bashtad.
"C'mon... lesh have a big faaakin party. Let yer hair down Britain!Everybody partaaay! Gimme another beer - wheresh the beer?"