Brittany MacDell

Brittany MacDell is one of the many kids orbiting the halls of Bridgeton Middle School in Big Mouth's sprawling, hormone-addled ecosystem — a peer caught up in the show's constant churn of gossip, cliques, and awkward social maneuvering. She's introduced as part of the background noise of adolescence, quick with an opinion and unbothered by how it lands.

Big Mouth thrives on flooding its hallways with vivid, fully-voiced minor characters rather than faceless extras, and Jenny Slate's comic instincts turn even a small role into something sharply funny and specific. Her delivery finds the absurdity in ordinary middle-school cruelty and confidence, making Brittany feel like a real kid rather than a plot device.