The LivingSocial offer, which went live on Thursday, offers a booklet of five Big Mac vouchers and five vouchers for large fries for $13 -- half of what it would have cost otherwise.
McDonald's is calling the offer the "largest daily deal run with a fast-food chain."
Rick Wion, director of social media for McDonald's, says the LivingSocial deal makes sense because December is a month when people are looking for deals and LivingSocial will expose the brand to newer, younger customers. Wion says that the Big Mac doesn't skew older than McDonald's would like per se, but it hits "a wide range of ages because it's such an iconic product."
That icon status will fuel the creative execution for a TV campaign this month that will present the burger as a "rock star," Wion says. The online leg of that campaign will include a Facebook app that invites users to a "party" hosted by the Big Mac that features their Facebook photos.