Use stream of consciousness to answer the following. Alex Borstein voices Lois Griffin, Asian correspondent Tricia Takanawa, Loretta Brown and Lois' mother Barbara Pewterschmidt. Borstein was asked to provide a voice for the pilot while she was working on MADtv. She had not met MacFarlane or seen any of his artwork and said it was "really sight unseen". At the time, Borstein performed in a stage show in Los Angeles, in which she played a redhead mother whose voice she had based on one of her cousins. The voice was originally slower (and deeper for the original series), but when MacFarlane heard it, he replied "Make it a little less fucking annoying ... and speed it up, or every episode will last four hours."

Who plays the voice of lois on family guy?
To answer the question, consider the following: Alex Borstein voices Lois Griffin, Asian correspondent Tricia Takanawa, Loretta Brown and Lois' mother Barbara Pewterschmidt. Final answer: Alex Borstein.