Pamela Hayden, the voice of Milhouse Van Houten and other characters on 'The Simpsons', is retiring after 35 years. Her final performance will be on November 24 during a special 'Treehouse of Horror' episode. Hayden thanked fans for their support and expressed her joy in voicing Milhouse, a character she noted as resilient despite facing constant challenges. Creator Matt Groening praised her contributions to the show. With Hayden's departure, the series plans to begin casting for her characters.