While the French newspaper Le Parisien/Aujourd'hui said on Thursday that the film would appear at the festival, the Madonna-directed movie, which is currently in post-production, it is not expected to be completed in time for Cannes and is instead aiming for a bow on the fall film circuit.
Madonna is expected to visit Berlin next month to host a private screening of select footage for foreign distributors attending the European Film Market.
W.E. stars Abbie Cornish and Oscar Isaac in parallel stories about the love affair between Wallis Simpson and King Edward VIII as well as one about a modern romance.
The official selection of films that will appear at Cannes won't be announced by artistic director Thierry Fremaux until April.