Tributes have been pouring in for the late country music icon Kenny Rogers, who has died at the age of 81.

Dolly Parton, who collaborated with Rogers on Islands In The Stream, posted a video on Twitter expressing her sadness that her "friend and singing partner" had died.

"You never know how much you love somebody until they're gone," Parton said.

"I've had so many wonderful years and wonderful times with my friend Kenny, but above all the music and the success I loved him as a wonderful man and a true friend."

The Grammys official Twitter led the tributes, saying they are "forever grateful" to Rogers.

Boy George thanked Rogers in his tribute, remembering a time when he played Islands In The Stream for the late George Michael.

The Golden Globes hailed him as an "icon" and Piers Morgan labelled him "one of the all-time great country music stars and an utterly charming man."

George Takei said his "voice will be missed."

Matt Lucas sent a simple tweet of thanks for Rogers "beautiful music".