We the # 1 fans of The Simpsons believe that there should be 3 new guest star voice actresses on The Simpsons, and it would be so much fun to see them voice new characters in seasons 26-37. It should star Dakota Fanning, Madison Pettis and Miranda Cosgrove as well. When should they voice new characters on The Simpsons? 2014! Sign here, if you want them to voice new characters on The Simpsons.