The "Malongo" family, what they're calling themselves to remain anonymous, say they stopped at the Exxon Mobile in Bensenville for a car wash.
The father grabbed a Powerball ticket while there and it matched all five numbers in the drawing on August 9: 7-14-23-24-60.
"I felt relieved, but my wife - she thought I was lying. Then she said, 'We're going to Disney World!'," the father said.
The family says they plan to use their winnings to further their children's education and take a trip to Disney.
"We hope we're all less stressed and just happy," he said.