Ryan Gosling, Michelle Williams Fuel Dating Rumors

12/21/2010 04:59 pm ET | Updated May 25, 2011
  • Sara Hammel people.com

In an interview with ABC News Nightline airing Tuesday, host Cynthia McFadden asks the Blue Valentine costars, both 30, if they're a couple.

As they exchange long glances, Gosling, who also calls her a "sexy cowboy" in the interview, whistles as if to pretend he didn't hear the question and Williams can't stop smiling. Gosling puts his arm around Michelle shakes her head "no" with a broad, mysterious grin.

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