Do you know who is the voice of SpongeBob?

ok so every time I see it and i press information says Scarlett Johansson and a few other people, but SpongeBob makes voice? Scarlett Johannson is? and no other person knows that all voices doeas characters?

Tom Kenny (SpongeBob SquarePants) http://en.wikipedia.org/wiki/SpongeBob_SquarePants_ (Character) Bill Fagerbakke (Patrick), Rodger Bumpass (Squidward) Carolyn Lawrence (Sandy) Clancy Brown (Mr. Krabs)

The actors and vocies of SpongeBob Squarepants