Russi Taylor

Russell "Russi" Taylor (May 4, 1944 - July 26, 2019) was an American voice actress, best known for voicing the character  since 1986, longer than any other voice actor. She voiced academic Martin (even in his singing voice), his mother Martha, twins Sherri and Terri, and German exchange student Üter. She also occasionally voiced Lewis Clark. She also performed for the special live show The Simpsons Take the Bowl.

After her death, Grey DeLisle took over her roles, starting with the Season 31 episode "Marge the Lumberjill".