(CNN) With fame comes fortune -- but also the tendency to be recognized in public places as you go about your daily business.

But for actor John Hannah, a recent encounter turned out to be a case of mistaken identity.

Hugh Laurie played the prickly Dr. Gregory House.

The Scottish star, whose long list of on-screen credits includes the movies "The Mummy," "Sliding Doors" and " Four Weddings and a Funeral ," was passing through Toronto airport when he was approached by a man who thought he looked familiar.

Gwyneth Paltrow and John Hannah in the 1998 drama 'Sliding Doors'

The only problem was that he believed him to be someone else entirely: Hugh Laurie, the star of hit medical drama "House." In fact, the man was so convinced of his star-spotting abilities that he even offered Hannah a wager.

In a tweet to his 24,400 followers after the encounter, Hannah wrote: "Just met a guy in the elevator at Toronto airport who asked if I was Hugh Laurie? I said no. He said I think you are! So I bet him $10 I wasn't. And he accepted. Passport out. He looked a bit surprised when I said he owed me 10 bucks. Fairs fair the dude paid up. "

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