Earlier this week, Jerry Seinfeld, Jason Alexander and Larry David reunited in New York City, to be precise Tom's Restaurant, which served as the visage for for the show's iconic Monk's diner. Though the actors kept mum as to what thy were doing there, production people working on the set told NYC newspapers that they're taping a Super Bowl ad for an undisclosed sponsor.

When asked directly what was going on inside the closed set, he only comment from Seinfeld himself was a mysterious, 'Top Secret.'

Seinfeld has previously done Super Bowl commercials for clients including American Express financial services and Acura automobiles.