Frampton and celebs back heroes
World boxing champion Carl Frampton will be one of a host of celebrity fans with a ringside seat.
The fighter from Tigers Bay will be cheering on the team with his dad Craig.
"There's loads of pressure but it's important how they deal with it," he said.
"It's huge, there hasn't been a Northern Ireland team that has qualified in my lifetime, so I'm hoping they can get everyone a nice holiday to France."
Veteran broadcaster Jackie Fullerton will be there as a guest of the IFA - but as a fan rather than a BBC commentator.
"Despite us missing players because of suspension and injury, I think the boys have got the momentum and they know three points tomorrow night seals the deal," said Jackie, who will be with wife Linda.
Former Northern Ireland footballer Gerry Armstrong, who flew in from his Majorca home, will be commentating for Sky Sports. Predicting a "tight game", Armstrong - who scored the winner against Spain in the side's epic 1982 World Cup performance - said the Greeks will put Greeks will put up a fight. "But I'm hopeful we can win," he said. "I'll be nervous but optimistic and we have the home support."
Belfast-born sports presenter Colin Murray will watch from the Northern Ireland supporters club in London. The TalkSport presenter said: "You have to be positive. I expect Steven Davis to step up and do the business with a goal tonight. "
Football fanatic and DUP MP Jeffrey Donaldson will watch with his wife in their Lagan Valley home. He said: "After years in the football wilderness we need to see our national team in next year's finals."