Morrisons has been the first supermarket to introduce the price hike in stores.
The price of two pints is up 6p to 86p, a rise of 7.5%.
It has also incresed the price of its Milk for Farmers range, with four pints up 5p to £1.38, a rise of nearly four percent, and two pints up 6p to 97p, up 6.5%.
Experts say other supermarkets are likely to follow Morrisons by increasing the price of milk. Morrisons declined to comment on the price rise.
Sadly farmers say the extra cash will not go to them.