01/18/2011 06:33 pm ET Updated May 25, 2011

Oak Park Family Wins $18.75 Million In Powerball, Chooses To Stay Anonymous

As of today, Illinois has its first-ever Powerball winner: a family in Oak Park has won $18.75 million, splitting the grand prize with a Kentucky winner.

Who it is, we may never know.

The family has chosen to keep their identities secret, instead claiming the prize through a group called the Shim Partnership, which will split the cash, according to the Chicago Sun-Times.

According to lottery officials, the family isn't frequent lottery players. But it was their son's birthday, so on the way out of town, they stopped by the Thornton Gas & Food Mart in Forest Park and picked up a ticket.

To their disbelief, they matched all five lucky numbers (1-8-10-19-20), and the Powerball number of 23.

They'll use part of the winnings to pay for their children's college educations, according to TribLocal. What will happen with the rest, they haven't disclosed.

The gas station will also take home a one-percent bonus of $187,000 for selling the winning ticket.

The win comes almost a full year after Illinois started selling Powerball tickets, on January 29 of last year.