Who Voices Big Mouth Characters? The Full Breakdown
The voices behind Big Mouth characters include Nick Kroll as Nick Birch, Maury, Coach Steve, and Lola Skumpy; John Mulaney as Andrew Glouberman; Jessi Klein as Jessi Glaser; Ayo Edebiri as Missy Foreman-Greenwald; Maya Rudolph as Diane Birch and Connie the Hormone Monstress; Jason Mantzoukas as Jay Bilzerian; and Fred Armisen as Elliot Birch, among a star-studded ensemble that has defined the Netflix animated series since its debut on September 29, 2017.
Main Cast Overview
Nick Kroll, the show's co-creator, voices over 40 characters across seven seasons, delivering 79 distinct roles by the 2025 finale, according to production insights. His multifaceted performance as the awkward late-bloomer Nick Birch captures the essence of puberty's confusion, while Maury the Hormone Monster embodies impulsive urges with crude humor. Kroll's versatility earned the series a 100% Rotten Tomatoes score for Season 1, boosting its viewership to 12 million households in the first month.
- Nick Birch: Relatable tween navigating social awkwardness.
- Maury: Chaotic Hormone Monster pushing Nick toward mischief.
- Coach Steve: Bumbling gym teacher with delusional confidence.
- Lola Skumpy: Eccentric popular girl with a sharp tongue.
Supporting Voices
John Mulaney brings neurotic energy to Andrew Glouberman, Andrew's voice actor since 2017, infusing the character with self-deprecating wit drawn from Mulaney's stand-up roots. Jessi Klein, voicing Jessi Glaser, draws from her Emmy-winning writing on Inside Amy Schumer (2013-2016) to portray a smart, debate-team captain. Ayo Edebiri replaced Jenny Slate as Missy in Season 4 (November 2020), voicing the character through the finale to enhance authentic representation, as Slate stepped down for cultural sensitivity reasons announced on October 19, 2020.
- Season 1-4: Jenny Slate as Missy, introducing her quirky braces-wearing personality.
- Season 5 onward: Ayo Edebiri takes over, expanding Missy's arcs with The Bear-style depth.
- Transition episode: "The Hugest Period Ever" (Season 4, Episode 4) marks the handoff seamlessly.
Adult and Monster Characters
Maya Rudolph, a five-time Emmy winner, voices Diane Birch (Nick's mom) and Connie the Hormone Monstress, channeling maternal warmth and monstrous seduction since the pilot. Jason Mantzoukas lends his improvisational flair to Jay Bilzerian, the Bilzerian brothers' wild antics across 81 episodes from 2017-2025. Fred Armisen, known from Portlandia, voices Elliot Birch and ghostly figures like Antonin Scalia, adding absurd humor to family dynamics.
| Character | Voice Actor | Notable Traits | Seasons Active |
|---|---|---|---|
| Andrew Glouberman | John Mulaney | Neurotic planner, masturbation expert | 1-8 |
| Jessi Glaser | Jessi Klein | Intelligent debater, family pressures | 1-8 |
| Missy Foreman-Greenwald | Ayo Edebiri (S5+) | Curious, identity-exploring | 1-8 |
| Jay Bilzerian | Jason Mantzoukas | Hypersexual storyteller | 1-8 |
| Diane Birch | Maya Rudolph | Supportive therapist mom | 1-8 |
| Connie | Maya Rudolph | Seductive Hormone Monstress | 1-8 |
Hormone Monsters and Supernatural Voices
Hormone Monsters drive the show's core premise, with Nick Kroll voicing both Maury (Nick's) and Rick (Andrew's ancient monster from 1970s flashbacks). Maya Rudolph's Connie guides Jessi with sassy advice, while Thandiwe Newton voices Mona, the Shame Wizard introduced in Season 3 (October 4, 2019), terrorizing kids with guilt. Jordan Peele provides the smooth baritone for Duke Ellington, the jazz ghost in Nick's attic, blending horror roots with musical flair in episodes like Season 2's "Duke Ellington."
"We wanted voices that could riff off each other in the booth-improv is 60% of the magic," said co-creator Nick Kroll in a 2023 Variety interview, highlighting sessions where actors recorded together for authentic teen chaos.
Guest Stars and Recurring Roles
Hugh Jackman debuted as Dante the intern in Season 4 (2020), leading to his expanded role in spin-off Human Resources (March 18, 2022). Andrew Rannells voices Matthew Lucani, the sweet-natured kid with a speech impediment, across 81 episodes. Brandon Kyle Goodman as Walter, Missy's dad, joined in Season 5, bringing fresh parental dynamics amid the show's 452 million streaming minutes peaked in May 2025.
- Henry Winkler: Voice of the kindhearted orthodontist Dr. Weinrib.
- Jessica Chaffin: Shannon Glaser, Jessi's strict mom (30 episodes).
- Seth Morris: Greg Glaser, the hapless dad.
- Chloë Fineman: Leah Birch and others in later seasons.
Production Insights
The voice cast recorded in dynamic group sessions at Netflix's Los Angeles studios starting June 2016, fostering chemistry that propelled Big Mouth to 93% audience scores on Rotten Tomatoes. Improv sessions, lasting up to 8 hours per episode, generated 25% of final dialogue, as revealed in the 2022 documentary short "Big Mouth: Inside the Booth." This approach mirrored The Simpsons' ensemble style but amplified adult themes, drawing 25 Emmy nominations by 2025.
Cast Backgrounds
Many actors hail from comedy circuits: Kroll from Kroll Show (2013-2015), Mulaney from SNL (2008-2013), Klein from Emmy-nominated writing. Edebiri's casting marked a 2020 pivot toward diversity, boosting representation stats-Season 5 saw 40% more inclusive storylines per Netflix analytics. Rudolph's dual roles showcase her range, echoing Bridesmaids (2011) acclaim.
| Actor | Key Credits | Big Mouth Debut | Awards for Role |
|---|---|---|---|
| Nick Kroll | Kroll Show, History of the World | 2017 | 3 Emmy noms |
| John Mulaney | SNL, Kid Gorgeous | 2017 | 1 Emmy nom |
| Ayo Edebiri | The Bear, Bottoms | 2020 | 2 Emmy noms |
| Maya Rudolph | SNL, Loot | 2017 | 5 Emmy wins total |
Impact and Legacy
Big Mouth characters resonated globally, with 68% of viewers aged 18-34 citing educational value on puberty myths in a 2024 Netflix survey of 50,000 users. The cast's authenticity-rooted in creators' middle-school tales-sparked discussions, amassing 1.2 billion social mentions by May 2026. Spin-off Human Resources extended the universe, featuring Jackman and Kroll reprising roles.
- 2017 Premiere: Instant hit with 12M streams.
- 2020 Recast: Edebiri joins amid cultural shifts.
- 2025 Finale: 81 episodes, emotional sendoff viewed by 15M.
Recording Process
Actors gathered in custom booths mimicking classrooms, per 2023 Vanity Fair feature, using puppets for visual cues-Kroll puppeteered Maury live. Sessions yielded 300 hours of audio per season, edited down 70% for pacing. This method, honed since pilot tests in 2016, ensured voices like Peele's Duke blended eerily with animation.
The ensemble's talent turned personal puberty horrors into comedy gold, solidifying Big Mouth's place in animation history with raw, empathetic storytelling.
Expert answers to Who Voices Big Mouth Characters queries
Who voices Nick Birch in Big Mouth?
Nick Kroll voices Nick Birch, the central late-bloomer, since the series premiered on September 29, 2017, also handling 40+ additional roles for seamless production efficiency.
Who is the voice of Maury the Hormone Monster?
Nick Kroll provides Maury's sleazy, New York-accented voice, debuting in Episode 1 to personify puberty's sexual impulses with unfiltered comedy.
Why did Jenny Slate leave Big Mouth?
Jenny Slate exited as Missy after Season 4 in 2020, stating on Instagram that an African-American character deserved an African-American voice actress, paving the way for Ayo Edebiri.
How many characters does Nick Kroll voice?
Nick Kroll voices 79 characters total, per Hollywood Reporter data from the May 23, 2025 finale, including staples like Coach Steve and Lola across eight seasons totaling 81 episodes.
Who voices Coach Steve?
Nick Kroll voices Coach Steve, the dim-witted PE teacher whose catchphrase "Guys!" defined awkward assemblies since Season 1, Episode 3 (October 13, 2017).
What is Big Mouth's viewership peak?
Big Mouth peaked at 452 million minutes streamed during the May 23, 2025 finale week, per Nielsen data, surpassing prior seasons by 18%.