Hank Azaria is a master of voices ... Most of the time the family dog Santa's Little Helper is voiced by another actor, Dan Castellaneta. However in one lone episode, "Treehouse of Horror XXV ...

Hank Azaria Admits He Does 'Wonder' About 'The Simpsons' ' Future — and Says Whether He'd Ever Leave (Exclusive) Hank Azaria Says He Auditioned Twice to Play Joey on' Friends' : 'Spoiler Alert ...