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I guess it depends what someone considers 'famous'?

A whole slug of actors: most of them from Stargate, Stargate Atlantis, Battlestar Galactia [old and new], Farscape [that took a trip to Oz, but it was very with it], Star Trek [all variants], Andromeda and some others.

A few military individuals: Gen Normal Schwarzkopf for one.

A couple of folks who are fairly well know in the medicine but no one would know outside of that world.

And one that will always stand out to me: Dr. Georg von Tiesenhausen who I met at 'Space Camp' back in the early 2000's when he came and gave a 2+ hour talk/lecture.