Corey Gregg Weinberg, Corey was approached to record a new safety spiel for the beginning of the ride. He only agreed to do it as long as it was an addition and didn't replace any of Paul Frees' original dialogue (of which he is a big fan).
This was not the case so he declined. The spiel was instead recorded by voice actor Joe Leahy. To date this has not been popular with Haunted Mansion enthusiasts and petitions are being drawn either to have Paul Frees reinstated or Corey to re-record it.