UPDATE 5.25PM: Over 100 hectares have been burnt in the fire.
A CFA spokesperson said there were reports of cattle in the paddock.
"It was a paddock fire.
"There were reports of cattle in the paddock but we do not believe they are in any danger.
"It is over 100 hectares.
"The fire is controlled, 30 units are still working on it."
UPDATE 4.15PM: A CFA spokesperson said 34 units were still on site tackling the blaze.
"The fire is contained," he said.
"We have 34 units still working on it.
"The latest size is 99 hectares.
"The advice remains the same.
"There is currently no threat to communities, but you should continue to stay informed and monitor conditions."
UPDATE 2.30pm: THE Greenhill fire is now contained.
The CFA has issued an advice message for Greenhill, Malmsbury, stating the fire in the area is now contained.
"There is currently no threat to communities, but you should continue to stay informed and monitor conditions," it reads.
"Smoke will be visible from nearby communities and roads. Firefighters will be in the area for some time."
UPDATE 1.40PM: CFA have issued an emergency warning for Malmsbury as an out of control grassfire heads towards the town.
State Control Centre spokesman Paul Huggett says there is a fast moving, out of control grassfire travelling in a westerly direction from Kyneton-Metcalfe Rd towards Malmsbury.
"The fire has jumped Old Quarry Road heading towards Malmsbury," he said.
"It is now too late to leave.
"We ask people to take shelter."
Mr Huggett said homes on Old Quarry Road are under attack.
A helicopter has been sent from Bendigo to fight the fire from the air.
Mr Huggett said nine CFA trucks were fighting the blaze, with another 12 on the way.
UPDATE 1.20PM: A WATCH and act warning has been issued for Greenhill.
"There is a small 7 hectare grassfire travelling fast in a northerly direction from the Kyneton-Metcalfe
Road," the warning says.
"This grassfire is currently not yet under control.
"Don't wait, leaving now is the safest option - conditions may change and get worse very quickly.
"Emergency Services may not be able to help you if you decide to stay."
FIREFIEGHTERS are responding to a bushfire in Greenhill, near Kyneton.
The VicEmergency website says a 15 acre fire near Kyneton-Metcalfe Road is not yet under control and is heading in a northerly direction.
"14 vehicles are attending," the website says.
"There is currently no threat to communities."