Riddle Re-Post

What do these guys have in common?

Philosopher Rene Descartes, “golden age” porn starlet Vanessa Del Rio, Presidential candidate Al Gore, author Nikolai Gogol, schlock producer Robert Lippert, Japanese avant-garde director Nagisa Oshima and actor Christopher Walken.

Adding to the list: Jedi Ewan McGregor, agitator Cesar Chavez and scientist Robert “My Biscuits Are Burnin’” Bunsen.