FORT COLLINS, Colo. — If you were walking through Old Town today and thought you saw the Fonz, it wasn't the heat playing tricks on you. 

Henry Winkler, known for his breakout role as greaser Arthur Fonzarelli on "Happy Days," was spotted shopping in downtown Fort Collins on Friday afternoon. 

Walnut Creek, a boutique near the corner of Walnut and Linden streets, posted two photos of Winkler to the shop's Facebook page. Winkler came in to the shop around noon Friday and posed for some pictures with an employee's puppy, Pippa.

Posts to Winkler's Twitter account indicate that he was in Wyoming earlier this week, where he went fishing.  

Read the full story in the Fort Collins Coloradoan:

SUGGESTED VIDEOSLocal stories from 9NEWS