The singer collaborated with Icelandic band múm on the track, which is available to download from iTunes now.
'Whistle' is taken from the soundtrack to Jack and Diane, the romantic drama starring Juno Temple and Riley Keough. Minogue also makes an appearance in the movie.
múm member Gunnar Tynes met with Minogue in London back in 2011, where the pair recorded the song.
"It is not the typical pop song we might have written for Minogue but we rather wrote it with the film in mind," Tynes said of the track.
Minogue recently signed a management deal with Jay-Z's Roc Nation and plans to release a new single "soon", followed by her 12th studio album.
Watch the trailer for Jack and Diane below: