Will Ferrell was the star of one of Super Bowl Sunday's steamiest commercials, but most of the country didn't see it!

The ad, for Old Milwaukee beer, only aired in three of the country's smaller markets - Glendive, Montana; Sherman, Texas; and Ardmore, Oklahoma.

In it, the funnyman passionately and wordlessly makes out with a woman while riding a bus.

Speaking with the website Eater late last year, the former SNL star said he's the face of the brew's campaign not for the dough -- he wasn't paid a dime -- but rather because they have given him "creative freedom to revive a brand, and shoot crazy fun commercials."

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"Old Milwaukee makes a product to get you drunk," the comedy ace, 45, joked. "It's good in eight or nine or ten samplings, you can't just enjoy one."