The NBA Finals kicked off Thursday night, with the Boston Celtics losing to the Los Angeles Lakers.  As is tradition, the two teams’ cities will work out a bet, and Los Angeles Mayor Antonio Villaraigosa has already put up a big prize, reports E! Online.

The Lakers’ biggest celebrity fan, Jack Nicholson, has been offered up by L.A., and if the Lakers lose, he will have to appear in a commercial for Boston, dressed in Celtics green.

Villaraigosa’s bet also makes certain that the stakes will be equal, saying “Should the Lakers prevail, we will gladly accept your hometown boys, Matt Damon and Ben Affleck, as spokespersons for a public service announcement extolling the virtues of the City of Los Angeles, where the climate, the beaches, and the food are far superior.”

As of yet, there is no word whether Boston Mayor Thomas Menino has accepted or not, we’re hoping this big bet will become official.