Ok, I'm still apprehensive about a celebrity doing Monterey pickup, but we might as well speculate on who it is.
My thoughts, can't be someone on the A list, those people wouldn't do it for the money/time involved. Likewise, probably not a female because MINIUSA wants the GP to have a macho rep. Doubt it would be a politician because of the problems with supporting a non US built car. So from the B list or lower males, I'm hoping for Terance Stamp.

Could be Rutger Haur though. I'm not speculating about any sports figures, don't follow sports enough to know any of the names.