Marie Cole as an adult.
Marie Cole (also credited as Marie Lynn Wise or Marie Wise) (born December 17, 1977 in Culver City, Los Angeles, California) is an actress who provided the voice of Marcie in the 1988 episodes "The Great Inventors," "The Smithsonian and the Presidency" and "The Music and Heroes of America" of This Is America, Charlie Brown.
She also appeared on the short-lived TV series Bustin' Loose.