The duet, which is rumoured to be part of an ITV special on the Australian artist, is one of many reported pairings said to feature, including others with Jason Donovan, Nick Cave, Robbie Williams and sister Dannii Minogue.

Kylie has, however, taken to Twitter and cryptically tweeted about the big duet: "it's just a rumour, but of course it would be amazing!! maybe one day:) #MadonnaKylieDuet"

Kylie is also set to release a Greatest Hits album with orchestral and acoustic ...