Tress MacNeille is an American voice actress known for her work in animation and video games. She has lent her voice to numerous characters in popular shows, including The Simpsons, where she voices characters like Nelson Muntz's mother and Dolph. Her versatile vocal range allows her to portray a wide variety of characters, making her a prominent figure in the industry. In addition to her work on The Simpsons, MacNeille has contributed to other animated series such as Futurama and Animaniacs. She has also voiced characters in video games, showcasing her talent across different media. Her contributions have made her a beloved figure among fans of animation.