Posters bearing the image of a familiar 90s sitcom star have mysteriously popped up on utility poles in downtown Toronto.

The likeness of Alfonso Lincoln Ribeiro, Sr., the actor who played Will Smith's goofy cousin Carlton Banks on the sitcom “The Fresh Prince of Bel-Air,” has been printed on paper and taped to polls along Carlton Street in downtown Toronto.

It's not clear why. Is it an art project? Is it a marketing ploy? Is it an inside joke by first-year university students celebrating Orientation Week?

Whatever the reason, the posters are making people smile and snap photos, many of which are turning up on social media sites like Instagram, Facebook and Twitter. Here are a few: