Saturday's estimated lottery jackpot will be "a whopping £11.6 million Must Be Won" prize, Camelot has said.
It is up for grabs after no one scooped Wednesday's jackpot by matching all six main numbers. No ticket-holders matched five numbers and the bonus ball to win £1 million.
Camelot's Andy Carter, senior winners' adviser at The National Lottery, said: "It promises to be an exciting night for Lotto players on Saturday with a whopping £11.6 million 'Must Be Won' jackpot up for grabs.
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"In a 'Must Be Won' draw, if the jackpot isn't won, the prize amount is shared out amongst the other prize tiers, meaning lots of players could win lots more." On Wednesday, there were 45 players who each won £1,750 after matching five of the six numbers.
The winning Lotto numbers were 11, 12, 14, 17, 44, 58 and the bonus number was 29. Set of balls 11 and draw machine Guinevere were used.
No players matched all five numbers to win £350,000 in the Lotto HotPicks, which uses the same numbers as the Lotto draw. The winning Thunderball numbers were 08, 18, 27, 30, 31 - and the Thunderball was 09.
There was one ticket holder who scooped the £500,000 top prize by matching five numbers and the Thunderball, while two players won £5,000 each for matching five numbers.
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