The Mega Millions jackpot saw stronger than expected ticket sales, so officials have increased the estimated jackpot for tonight's huge drawing.
This morning, the top prize grew to an anticipated $865 million.
The drawing is at 10:00pm Central Time.
The $856 million jackpot would be the third largest prize in American lottery history.
Meanwhile, tomorrow night's Powerball is up to an estimated jackpot of $730 million.
