I always wondered if they ever played around with the voices in public. Now I know.
well, it’s hard to miss lisa simpson’s voice, that’s the actress’ natural voice.
Director Kevin Smith on a talk show mentioned that whenever Johnny Depp was in Hollywood with this family their kids would play together. All of them would enjoy Depp doing the voice of his character Captain Jack. So when the kids came over to his house Smith would do his character, Silent Bob. They weren’t impressed.
Back when "The Lion King" was out in theaters, Nathan Lane (the voice of Timon the meerkat) and Ernie Sabella (the voice of Pumbaa the warthog) were in a supermarket when they noticed some kids (with their parents) congregating in another aisle. They decided to do their characters talking. "Y'know, I should get this high-fiber cereal, Timon; it'd be good for my digestion." "Well, anything'd be an improvement over YOUR digestion, Pumbaa!"
The kids with their parents in tow came running over to the cereal aisle! They introduced themselves and showed the kids how they were the voices of the characters. The kids weren't TOO disappointed...