Diane Birch

Diane Birch moves through the adult world that surrounds Big Mouth's teenage chaos, an authority figure glimpsed at the edges of the kids' lives. She carries herself with a knowing, unbothered air, dispensing opinions and reactions that suggest she's seen it all before and finds most of it funny.

Maya Rudolph brings her signature warmth and comic timing to the role, turning even brief appearances into something memorable. Her delivery finds the absurdity in ordinary adult exasperation, giving Diane Birch a presence that lands harder than her screen time alone would suggest.