Michigan Lottery officials plan to introduce the winner of this month's $337 million Powerball jackpot during a news conference scheduled for Friday.
The lottery says the announcement is planned at the lottery's headquarters in Lansing.
Michigan Lottery spokeswoman Andi Brancato says Monday that details about the ticket-holder won't be released until the event.
The winning ticket for the Aug. 15 drawing was sold at a Sunoco gas station in Lapeer, about 45 miles north of Detroit.
The winner had one year to claim the prize. It was the third-largest Powerball jackpot in the game's history.
Lottery officials have said the winner could take home a $241 million lump sum.