The filmmaker, who worked with Hunter in the 1992 hit Strictly Ballroom, is "pulling for" the 71-year-old acting legend, who was admitted to a Melbourne facility on Monday (16May11) after refusing to go to hospital.
And Luhrmann, who also cast Hunter in his 2008 epic Australia, insists the star has been an asset to the film industry Down Under.
He says, "Whether portraying Australians fighting on the foreign shores in Gallipoli, or the hard-nut, famous-to-this-day journos seeking stories in Newsfront, to his effortless switch to high comedy in the films where we tried to capture contemporary suburban culture, in Strictly Ballroom, Muriel's Wedding, and Priscilla, Bill was the go-to iconic actor to synthesise quintessential Australian-ness.
"We are all pulling for Bill in this difficult time, but we can take comfort that we will always see Bill again through the remarkable body of work that he has left on the screen."
Hunter's manager Mark Morrissey has confirmed the gravely ill star has been resting with family at his bedside.