She is voiced by Francesca Capaldi who also voiced Frieda .
The film marked the first time the Little Red - Haired Girl spoke in all Peanuts - related media , with Charlie Brown finally succeeding in talking to her .
Little Red - Haired Girl is voiced by Francesca Capaldi who also voiced Frieda .
The film marked the first time the Little Red - Haired Girl spoke in all Peanuts - related media , with Charlie Brown finally succeeding in talking to her .