Will Arnett
BoJack Horseman / Butterscotch Horseman (voice) (12 eps)
Aaron Paul
Todd Chavez / AA Bird / Donkey Kid / Skippy (voice) (12 eps)
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) (12 eps)
Amy Sedaris
Princess Carolyn / Sharona (voice) (12 eps)
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 (12 eps)
Angela Bassett
Ana Spanakopita (voice) (8 eps)
Diedrich Bader
Judah Mannowdog (voice) (5 eps)
Mara Wilson
Jill Pill (voice) (4 eps)
Abbi Jacobson
Emily (voice) (4 eps)
Jeffrey Wright
Cuddlywhiskers (voice) (3 eps)
Constance Zimmer
Skinny Gina (voice) (3 eps)
Mike Hollingsworth
Duck Patron (voice) (3 eps)
Adam Conover
Bradley Hitler-Smith (voice) (3 eps)
Fielding Edlow
Roxy (voice) (3 eps)
Kristen Schaal
Sarah Lynn (voice) (3 eps)
Raúl Esparza
Ralph Stilton (voice) (3 eps)
Lorraine Bracco
Dr. Janet (voice) (2 eps)
Patton Oswalt
Pinky Penguin (voice) (2 eps)
Raphael Bob-Waksberg
Charley Witherspoon (voice) (2 eps)
'Weird Al' Yankovic
Captain Peanutbutter (voice) (2 eps)
Keith Olbermann
Tom Jumbo-Grumbo (voice) (2 eps)
Margo Martindale
Character Actress Margo Martindale (voice) (2 eps)
Terry Gross
Diane's Ringtone (voice) (1 eps)
Jonathan Lethem
Diane's Ringtone (voice) (1 eps)
Jesse Novak
Bouncer (voice) (1 eps)
Wyatt Cenac
Wayne (voice) (1 eps)
Alan Arkin
J.D. Salinger (voice) (1 eps)
Fred Savage
Richie Osborne / Goober (voice) (1 eps)
Greg Kinnear
Greg Kinglear (voice) (1 eps)
Melissa Leo
Ma Nguyen (voice) (1 eps)
Elvis Mitchell
Host of Screening (voice) (1 eps)
Emily Deschanel
Bones (voice) (1 eps)
Dave Franco
Alexi Brosefino (voice) (1 eps)
Jorge Garcia
Jorge Garcia (voice) (1 eps)
Tessa Thompson
Taneisha (voice) (1 eps)
Russell Peters
Driver (voice) (1 eps)
Nicole Byer
Teenage Girl (voice) (1 eps)
Patrick J. Carney
Jay Zebra (voice) (1 eps)
Daniele Gaither
Sextina Aquafina (voice) (1 eps)
Leonard Maltin
Leonard Maltin (voice) (1 eps)
Jay Mohr
Jurj Clooners / Foggy St. Jerusalem / TV Doctor (voice) (1 eps)
Caleb Bark
Rep / Actor #1 (voice) (1 eps)
Candice Bergen
The Closer (voice) (1 eps)
Anna Deavere Smith
Betty Bruce (voice) (1 eps)
Kristin Chenoweth
Vanessa Gekko (voice) (1 eps)
Rachel Bloom
Laura / Katie Rabitowitz (voice) (1 eps)
Jamie Clayton
Lady in Stall (voice) (1 eps)
Baron Vaughn
Waiter / Possum at the Bar (voice) (1 eps)
Kate Berlant
Stage Manager / Human Patron (voice) (1 eps)
Kevin Bigley
Shep von Trapp / Jimmy Fallon (voice) (1 eps)
Wiz Khalifa
Wiz Khalifa (voice) (1 eps)
Neil deGrasse Tyson
Planetarium Narrator (voice) (1 eps)
Rufus Wainwright
Drinking Bird / The Overtones (voice) (1 eps)
Lake Bell
Katrina Peanutbutter / Cargo Ship Captain / Chloe (voice) (1 eps)
Carla Hall
Spaghetti Scientist Carla Hall (voice) (1 eps)
Jake Johnson
Oxnard (voice) (1 eps)
Ben Schwartz
Rutabaga Rabitowitz (voice) (1 eps)
Kimiko Glenn
Stefani Stilton (voice) (1 eps)
Natasha Leggero
Heather (voice) (1 eps)
Ilana Glazer
Penny Carson (voice) (1 eps)
Phil LaMarr
Judge (voice) (1 eps)
J.K. Simmons
Lenny Turtletaub (voice) (1 eps)
Cedric Yarbrough
Officer Meow-Meow Fuzzyface (voice) (1 eps)
Jessica Biel
Jessica Biel (voice) (1 eps)