Tons of movie stars wear hairpieces on screen. Heck, watch Saturday Night Live. Will Ferrell was the king of numerous hairpieces on a show!

Nicholas Cage comes to mind, as well as Bruce Willis in movies where they wore hairpieces.

Really not uncommon at all.

As far as if they do in real life? I'm sure some do, some don't. Any time they are in the public eye, I'm sure they try to have their hairline as undetectable as possible. I always laugh at the obsession about if someone does or doesn't wear. Who cares. Does it make them any less or more of an actor if they do or don't?

Heck, the WWE owner Vince McMahon used to tell his color commentator Jerry Lawler to make fun of his toupee. And McMahon didn't even wear one!