One Trick Pony

Will Arnett

BoJack Horseman / Butterscotch Horseman (voice)

Aaron Paul

Todd Chavez / AA Bird / Donkey Kid / Skippy (voice)

Alison Brie

Diane Nguyen / Vincent Adultman / Kevin / Samantha The Food Critic / Olivia / Joelle Clark / Otter / Cow Waitress / Sarah Lynn's Assistant / Ship Co-Captain / Golden Snowflake Announcer / Nurse / Waitress / Cow Waitress / Announcer (voice)

Amy Sedaris

Princess Carolyn / Sharona (voice)

Paul F. Tompkins

Mr. Peanutbutter / Marv / Virgil Van Cleef / Prescott / Andrew Garfield / Sandro / Dog Valet / Underwater Man / Concerned Man / Janitor / Bartholomew Scagsworth / Sloth Lawyer / Blimp Co-Pilot / Abortion Doctor / George Tickle / Giant Chocolate Oscar Guy / Actor #2 / Bird / Willie Wesleyan (voice)

Kevin Bigley

Quentin Tarantulino (voice)

Patton Oswalt

Pinky Penguin / Laughing Crew Member (voice)

Wallace Shawn

Wallace Shawn (voice)

Kulap Vilaysack

Film Crew Assistant (voice)

Naomi Watts

Naomi Watts (voice)

Wyatt Cenac

Wayne (voice)

Adam Conover

A Ryan Seacrest Type / Paparazzi Blue Jay (voice)

J.K. Simmons

Lenny Turtletaub (voice)