Leah Birch is an American voice actor and writer best known for voicing Missy Foreman-Greenwald on the Netflix animated series Big Mouth. Her performance adds a grounded, observant perspective to the ensemble as Missy navigates middle school, friendship, and early adolescence. This profile outlines Birch’s contributions to Big Mouth, her range as a voice performer, and verifiable credits, separating character truth from behind-the-scenes rumor while maintaining a factual, evergreen baseline for new and returning viewers.
