Maggie Simpson

Margaret Simpson ("Maggie") is the youngest daughter in The Simpsons household, eternally a baby. Her claim to fame is sucking on her pacifier[?] and falling down frequently as she struggles to walk. She has spoken only one word in the normal continuity of the series--"Daddy" (voiced by Elizabeth Taylor)--and no one heard it.

During one of the Halloween episodes, she was an Alien/Human crossbread and had the voice of James Earl Jones.

See: Characters from The Simpsons