- Jim Howick
- Â Various / ... 51 episodes, 2009-2015
- Simon Farnaby
- Â Various / ... 51 episodes, 2009-2015
- Mathew Baynton
- Â Various 47 episodes, 2009-2013
- Martha Howe-Douglas
- Â Various / ... 47 episodes, 2009-2013
- Ben Willbond
- Â Various / ... 47 episodes, 2009-2013
- Laurence Rickard
- Â Various / ... 45 episodes, 2009-2013
- Jessica Ransom
- Â Various / ... 35 episodes, 2015-2024
- Tom Stourton
- Â Various / ... 35 episodes, 2015-2024
- Jon Culshaw
- Â Additional Voices / ... 30 episodes, 2009-2023
- James McNicholas
- Â Various / ... 27 episodes, 2017-2024
- Harrie Hayes
- Â Various / ... 25 episodes, 2019-2024
- Emily Lloyd-Saini
- Â Various 25 episodes, 2019-2024
- Paul G. Raymond
- Â Various / ... 23 episodes, 2021-2024
- Dominique Moore
- Â Various / ... 23 episodes, 2010-2022
- Timmika Ramsay
- Â Various 22 episodes, 2021-2024
- Jalaal Hartley
- Â Various / ... 21 episodes, 2012-2019
- Sarah Hadland
- Â Various / ... 20 episodes, 2009-2012
- Ethan Lawrence
- Â Various 20 episodes, 2021-2024
- Inel Tomlinson
- Â Various 19 episodes, 2021-2024
- Alice Lowe
- Â Various 18 episodes, 2010-2011
- Lawry Lewin
- Â Various / ... 18 episodes, 2009-2015
- Jess Robinson
- Â Additional Voices / ... 18 episodes, 2009-2011
- David Baddiel
- Â Vincenso Larfoff 15 episodes, 2009-2011
- Alexander Richardson
- Â Background 14 episodes, 2012
- Richard David-Caine
- Â Various 13 episodes, 2017-2022
- Dan Li
- Â Various / ... 12 episodes, 2015-2017
- Katy Wix
- Â Various 10 episodes, 2009-2011
- Meera Syal
- Â Storyteller 10 episodes, 2009
- Matthew Fenton
- Â Various 8 episodes, 2009-2012
- Reece Shearsmith
- Â Hollywood Producer #1 / ... 10 episodes, 2012-2013
- Javone Prince
- Â Various 9 episodes, 2009-2019
- Susie Donkin
- Â Various 8 episodes, 2009-2012
- Dave Lamb
- Â Come Dine With Me Presenter 9 episodes, 2010-2011
- Steve Pemberton
- Â Hollywwod Producer #3 / ... 9 episodes, 2012-2013
- Mark Gatiss
- Â Hollywwod Producer #2 / ... 9 episodes, 2012-2013
- Lisa Devlin
- Â Various 8 episodes, 2009
- Michael Abubakar
- Â Various 8 episodes, 2019
- John Eccleston
- Â Puppeteer / ... 8 episodes, 2015-2019
- Gemma Whelan
- Â Various 7 episodes, 2017-2022
- Jason Lewis
- Â Various / ... 7 episodes, 2012-2015
- Adam Riches
- Â Various 7 episodes, 2015
- Rhashan Stone
- Â Various 6 episodes, 2009-2011
- Giles Terera
- Â Various 6 episodes, 2009-2015
- Naz Osmanoglu
- Â Various 6 episodes, 2015
- Chris Luck
- Â Hannibal Sketch / ... 4 episodes, 2011-2015
- Chris Chan
- Â Various 5 episodes, 2021-2024
- Bertie Gilbert
- Â 2009 / ... 4 episodes, 2009-2011
- Natalie Walter
- Â Various 4 episodes, 2015-2017
- Louise Ford
- Â Various / ... 4 episodes, 2015
- Kiell Smith-Bynoe
- Â Various / ... 4 episodes, 2021-2022
- Divian Ladwa
- Â Various 4 episodes, 2021-2022
- Vivian Full
- Â Empress Dowager Cixi 3 episodes, 2023-2024
- Steve Punt
- Â Various 1 episode, 2009
- David Lanco
- Â Rattus Rattus' Voice 3 episodes, 2009-2011
- Sophie Wu
- Â Various / ... 3 episodes, 2015-2022
- George Sawyer
- Â Various 2 episodes, 2009
- Ceri Jerome
- Â Oliver Cromwell Dancer / ... 1 episode, 2011-2015
- Deborah Wise
- Â Team Homo Sapien Cavegirl / ... 2 episodes, 2012
- Sanjeev Bhaskar
- Â Singing Greek God / ... 2 episodes, 2015-2017
- Katherine Jakeways
- Â Various 2 episodes, 2015
- Chris Wilson
- Â Pirate / ... 2 episodes, 2017
- Stephen Samson
- Â Puritan 2 episodes, 2019
- Sarah Sayuri Leung
- Â Gasia / ... 2 episodes, 2019
- Verona Rose
- Â Various 2 episodes, 2021-2022
- Viraj Juneja
- Â Various 2 episodes, 2023-2024
- Ben Miller
- Â King John 1 episode, 2015
- Rose Ayling-Ellis
- Â Self - Presenter 1 episode, 2022
- Robert Rinder
- Â Judge Rinder 1 episode, 2024
- Alexei Sayle
- Â Dr. Ushma 1 episode, 2010
- Steven Hopwood
- Â Amputee slave 1 episode, 2009
- Lawrence Stevenson
- Â Dave 1 episode, 2009
- Daniel Lawrence Taylor
- Â Slave 1 episode, 2010
- Fergal Coghlan
- Â Achilles (2010) 1 episode, 2010
- Allin Kempthorne
- Â Israel Hands 1 episode, 2010
- Christian Wolf-La'Moy
- Â Victorian gentleman 1 episode, 2011
- Scott Brooker
- Â Rattus Rattus 1 episode, 2011
- Tanni Grey-Thompson
- Â Self 1 episode, 2011
- Chris Addison
- Â Various 1 episode, 2012
- Andrew Sykes
- Â The Caveman 1 episode, 2012
- Craig Izzard
- Â Cavalier Soldier 1 episode, 2012
- Carl Nortey
- Â Sailor 1 episode, 2012
- Yasmin Ogbu
- Â Cleopatra Dancer 1 episode, 2013
- Rowan Atkinson
- Â Henry VIII 1 episode, 2015
- Kathryn Drysdale
- Â Cleopatra 1 episode, 2015
- Kevin Eldon
- Â William the Conqueror 1 episode, 2015
- Tom Rosenthal
- Â Alfred the Great 1 episode, 2015
- Bhavna Limbachia
- Â Various 1 episode, 2015
- Lorna Watson
- Â Various 1 episode, 2015
- Seelan Gunaseelan
- Â Indian Servant 1 episode, 2015
- Lile Gibney
- Â Young Mary Queens of Scotts 1 episode, 2015
- Ryan Sampson
- Â Various 1 episode, 2017
- Pete Nata
- Â Egyptian Harp Player 1 episode, 2017
- Mike Wozniak
- Â Ensemble Actor 1 episode, 2019
- Phil Wang
- Â Various 1 episode, 2019
- Danielle Vitalis
- Â Ensemble Actor 1 episode, 2019
- Dara Ó Briain
- Â Various 1 episode, 2019
- Joakim Skarli
- Â Norwegian Politician 1 episode, 2019
- Marie Hamm
- Â Victorian woman 1 episode, 2019
- Manj Gill
- Â Army General 1 episode, 2019
- Esha Patel
- Â Student 1 episode, 2019
- Tia Gatward
- Â Ensemble Actor 1 episode, 2019
- Alfredo Tavares
- Â Squatting Official 1 episode, 2020
- Holly H
- Â Holly H - Self 1 episode, 2020
- Bruno Tonioli
- Â Emperor Nero 1 episode, 2021
- Shirley Ballas
- Â Self 1 episode, 2021
- Oliver Wellington
- Â Boughwa Gegansmel / ... 1 episode, 2021
- Gianni Calchetti
- Â Various 1 episode, 2022
- Marli Hart
- Â Viking 1 episode, 2022
- Kieran Simon
- Â Viking 1 episode, 2022
- Kalisha A. Johnson
- Â Georgian Hairdresser 1 episode, 2022
- Jo Brand
- Â Host 1 episode, 2023
- Sammy Jonas Heaney
- Â Stanislavsky 1 episode, 2023
- Jill Scott
- Â Self 1 episode, 2023
- Alison Fitzjohn
- Â Ensemble / ... 1 episode, 2023
- Richard Sutar
- Â Invading Saxon 1 episode, 2023
- Morgan Philpott
- Â Eric Viking - Sir Robert Walpole 1 episode, 2023
- Jeffrey Chekai
- Â Various 1 episode, 2023
- Martin Alexander Colton
- Â Ugly Groom 1 episode, 2023
- Eden Howarth
- Â Various 1 episode, 2023
- Jessica Chow
- Â Peng Xiyun 1 episode, 2023
- Frank Wilson
- Â Various 1 episode, 2023
- Rosie Jones
- Â Various 1 episode, 2024
- Terry Deary
- Â Various (uncredited) 17 episodes, 2009-2011
- Ethan Keaton
- Â Various (uncredited) 3 episodes, 2017-2019
- Mari Ann Bull
- Â Girl in match factory / ... (uncredited) 2 episodes, 2012
- John Whitby
- Â Policeman (uncredited) 1 episode, 2009
- Molly Conlin
- Â Little Girl in Mellified Man Advert (uncredited) 1 episode, 2012
- Richard Price
- Â Gas Mask Singer (uncredited) 1 episode, 2019
- Robert McCrea
- Â Drunken Sailor (uncredited) 1 episode, 2022
- Darren Sinden
- Â Italian villager (uncredited) 1 episode, 2022
- Ryan L. Coleman
- Â Dr.Dudgeon (uncredited) 1 episode, 2023