Hard To Believe
At the time this picture was taken, all three of these people were widely considered to be among the funniest people alive.
If I were under, say, 16 or 17 years of age, I would believe that statement to be a blatant, pathetic lie. (Hell, I'm 36, and I still can't believe that anyone ever thought Whoopi was funny.)
That last poster reminds me... I would also find it hard to believe that Robert De Niro had once been considered the greatest actor in the world, who mainly appeared in the most prestigious of projects helmed by the finest directors.