Transcript for Countdown begins for Mega Millions $1.6 billion drawing
All right, I'm starting to sound like a broken record. The mega millions is now at $1.6 billion. And gio Benitez has been in line for days now. Gio? Reporter: Hey, David, yeah, here's that number we learned of. 75% of all possible combinations are expected to be sold by tonight. And that means that 25%, there's a 25% chance that there will be no winner again tonight. And if that happens, a truly unbelievable jackpot, we're looking at $2 billion. David? All right, there's got to be a winner tonight. Let's hope. Gio, good luck to you and everyone at home. And I hope to see you right back here tomorrow. I'm David Muir. From all of us here at ABC news, thanks for watching. Have a good evening.
This transcript has been automatically generated and may not be 100% accurate.