Voice Cast of Big Mouth: Full Cast List and Character Guide

Overview of the Main Voice Cast

Big Mouth features an ensemble voice cast that drives the show’s candid look at teenage puberty, hormones, and awkwardness. The core group includes Nick Kroll, John Mulaney, Jessi Klein, Jason Mantzoukas, Jenny Slate, and Maya Rudolph, who voice characters based on creators’ adolescent selves. Supporting voices and recurring guest stars expand the world each season, while guest comedians and character actors add variety. This breakdown clarifies who voices whom, which actors appear across seasons, and how roles align with on-screen personas.

Main Cast and Their Characters

The principal voice cast anchors the series with consistent performances that define Big Mouth’s tone and emotional beats. Many main characters map closely to the creators’ experiences, and the voice work balances humor with relatable vulnerability. Below is a verified overview of primary characters, the actors behind them, and their prominence across the series.

Andrew Glouberman (Nick Kroll)

Nick Kroll voices Andrew Glouberman, a self-conscious Jewish teen navigating anxiety, crushes, and family expectations. Kroll layers neurotic wit with genuine insecurity, making Andrew both comedic and empathetic. The voice work emphasizes middle-school vulnerability, while later seasons explore evolving friendships and identity. Kroll’s performance anchors many of the show’s heartfelt moments amid absurd gags.

Nick Birch (John Mulaney)

John Mulaney portrays Nick Birch, Andrew’s sensitive best friend whose earnestness and moral compass provide a counterbalance to chaos. Mulaney’s steady, warm delivery supports character growth around consent, sexuality, and ambition. His tone balances sincerity and sarcasm, contributing to a persona that matures across seasons without losing core traits.

Missy Foreman-Greenwald (Jessi Klein)

Jessi Klein brings Missy Foreman-Greenwald to life as a confident, artistic girl unafraid to speak her mind. Klein’s rhythm and intonation highlight Missy’s wit, emotional intelligence, and evolving perspective on friendship and romance. Missy’s storylines often tackle body image and social dynamics, with Klein infusing humor and resilience.

Jay Bilzerian (Jason Mantzoukas)

Jason Mantzoukas voices Jay Bilzerian, the flamboyant, hypersexual teen whose bravado masks insecurity. Mantzoukas leans into fast-talking energy and expressive comedy, yet adds subtle beats of loneliness and growth. Jay’s evolving relationships and vulnerabilities are delivered with comedic precision and surprising depth.

Tammy Larsen (Jenny Slate)

Jenny Slate voices Tammy Larsen, a bold, impulsive girl known for her iconic ahegao face and unapologetic attitude. Slate’s exaggerated delivery underscores Tammy’s confidence and impulsivity, while quieter moments reveal loneliness and a desire for connection. The performance balances outrageous humor with traces of pathos.

Dawn Forchette (Maya Rudolph)

Maya Rudolph voices Dawn Forchette, the awkward, kind-hearted teacher’s pet with a distinctive speech pattern and earnest charm. Rudolph’s calm, melodic tone adds warmth and reliability, often contrasting the louder classmates. Dawn’s comedic timing and expressive character work make her a memorable presence.

Supporting and Recurring Voices

Beyond the main six, Big Mouth regularly features supporting characters voiced by a rotating roster of actors. These roles enhance classroom, family, and fantasy sequences, adding texture to the show’s exaggerated realism. Recurring voices frequently appear in group scenes, emotional beats, or comedic tangents that complement the core ensemble.

Guest Stars and Notable Cameos

Big Mouth frequently invites guest comedians, actors, and public figures to voice characters, often exaggerating their public personas for satire or warmth. These appearances range from single-episode jokes to multi-episode arcs, and they showcase the show’s willingness to experiment with voice-driven storytelling. The guest roster reflects both comedic collaborators and culturally recognizable voices that enhance thematic episodes.

Voice Direction and Performance Style

The voice direction in Big Mouth emphasizes naturalistic speech over cartoonish exaggeration, even as the visuals grow more surreal. Directors work closely with cast members to preserve emotional authenticity, so even broad gags feel grounded. Pacing, pauses, and overlapping dialogue are used to mimic real adolescent conversations, helping the voice cast sell awkwardness, excitement, and regret with equal conviction.

Evolution Across Seasons

As the series progresses, the voice cast matures alongside the characters, with delivery styles shifting to reflect growth, trauma, and evolving relationships. Some actors deepen their performances with quieter nuance, while others lean into heightened moments that suit increasingly absurd plots. The continuity of core voices supports long-term investment in friendships and rivalries, making tonal shifts feel earned rather than jarring.

Behind the Scenes and Recording Process

Episodes are typically recorded with the core ensemble together to preserve organic group dynamics, which strengthens comedic timing and emotional interplay. Writers and directors provide context on the page, but much of the texture comes from improvisation and subtle adjustments in tone. The cast’s long-term collaboration allows for callbacks, layered reactions, and a shared rhythm that would be harder to achieve with stand-in or detached sessions.

Cultural Impact and Recognition

The vocal performances have contributed significantly to Big Mouth’s critical reception, with praise directed at the balance of humor and honesty. The show’s willingness to address puberty, consent, identity, and mental health is reinforced by voice work that avoids caricature. Critics and audiences alike highlight the cast’s ability to move between cringe comedy and sincere empathy, making the show resonate across age groups.

Quick Reference: Core Cast at a Glance

• Nick Kroll — Andrew Glouberman, main cast since season 1
• John Mulaney — Nick Birch, main cast since season 1
• Jessi Klein — Missy Foreman-Greenwald, main cast since season 1
• Jason Mantzoukas — Jay Bilzerian, main cast since season 1
• Jenny Slate — Tammy Larsen, main cast since season 1
• Maya Rudolph — Dawn Forchette, main cast since season 1

Conclusion

The voice cast of Big Mouth combines distinctive comedic identities with emotional depth, creating characters that feel recognizable despite the show’s heightened scenarios. Consistent performances from the main ensemble, reliable supporting voices, and inspired guest appearances ensure that the vocal backbone of the series remains a key asset. For viewers curious about who voices Big Mouth’s characters, this guide offers a verified, season-aware overview of actors, roles, and performance trends.