The cost of playing Euromillions will rise by 50p to £2.50 a line.
Changes to the popular jackpot will mean the chances of winning are less likely - but prizes will be bigger.
Camelot says the move will double the number of UK millionaires.
As well as the price increase, players will have to choose from an extra number.
- How will the new number system work?
Players will still pick five main numbers from one to 50 and two lucky stars, now from one to 12 rather than 11.
The extra lucky star will lessen the chance of winning the jackpot from approximately one in 117 million currently to one in 140 million, but Camelot said the overall odds of winning any prize on Euromillions remained at 1 in 13.
- What will change?
Camelot says there will be bigger jackpots more often with higher starting figures of £14 million and more than twice as many jackpots of more than £50 million a year.
There will also be bigger promotional draws offering jackpots of around £100 million, and new "must-be-won" European Millionaire Maker events, the first of which is expected to take place at the end of October with the creation of 25 extra millionaires.
Local UK "enhancements" will include at least two guaranteed UK millionaires in every draw through the UK Millionaire Maker, making double the current number of guaranteed UK millionaires a year at 208.
- Why the cost increase?
- When will the new higher-price tickets go on sale?
Tickets for the first new Euromillions draw on September 27 will go on sale on September 24.
National Lottery Lotto draw changes that took place in 2015
- The number of balls increased from 49 to 59
- The jackpot decrease from one in 14 million to one in 45 million