John Stamos, is that really you? No matter how much your mind might be trying to tell you otherwise, this really is a picture of the 'Full House' actor, taken during the 1980s. This is such an old picture that it's from before he even landed the 'Full House' role.
Based on all the evidence we've seen so far, we have to assume that every actor's agent told them that having long hair was the only way to get ahead in the 1980s. There's no other explanation for it!