Australia's Chris, the world's woolliest sheep, has died. Photo IC

An Australian sheep who made headlines in 2015 for the record-breaking weight of his fleece has died.

The animal, believed to be aged about 10, was found dead on Tuesday morning by his minders, having died of old age, said Kate Luke, co-founder and vice president of the Canberra-based Little Oak Sanctuary, a charity that shelters over 180 farm animals.

"We are heartbroken at the loss of this sweet, wise, friendly soul. Chris is known as the world record holder for having grown the heaviest fleece on record," the sanctuary said in a Facebook post.

"He was so much more than this, so very much more, and we will remember him for all that he was - someone, not something."