- Chris O'Dowd
- Â Roy Trenneman 25 episodes, 2006-2013
- Richard Ayoade
- Â Maurice Moss 25 episodes, 2006-2013
- Katherine Parkinson
- Â Jen Barber 25 episodes, 2006-2013
- Matt Berry
- Â Douglas Reynholm 17 episodes, 2007-2013
- Christopher Morris
- Â Denholm Reynholm 7 episodes, 2006-2008
- Noel Fielding
- Â Richmond 7 episodes, 2006-2013
- Graham Linehan
- Â Beth Gaga Shaggy / ... 1 episode, 2006-2013
- Tom Binns
- Â Nolan 3 episodes, 2008
- Lewis Macleod
- Â Charity Voice / ... 3 episodes, 2008
- Belinda Stewart-Wilson
- Â Barbara / ... 2 episodes, 2007-2010
- Peter Serafinowicz
- Â Lift / ... 2 episodes, 2006
- Gemma Chan
- Â Female Sulu / ... 2 episodes, 2010
- Cordelia Bugeja
- Â Abi 2 episodes, 2006-2007
- Togo Igawa
- Â Japanese Boss / ... 2 episodes, 2006-2008
- John Willie Hopkins
- Â Postman / ... 2 episodes, 2006-2008
- Dolly Wells
- Â Miranda / ... 2 episodes, 2007-2010
- Pete Deagle
- Â Office Worker 2 episodes, 2006
- Ben Moor
- Â Newton / ... 2 episodes, 2008-2013
- Nancy Lodder
- Â Office Girl / ... 2 episodes, 2006
- Bennet Thorpe
- Â Clown / ... 2 episodes, 2006
- Margaret Cabourn-Smith
- Â Anonymous' Mum / ... 2 episodes, 2010-2013
- Charlotte Weston
- Â Jessica / ... 2 episodes, 2006-2007
- Adam Leese
- Â Barry 1 episode, 2008-2010
- Hannah Bourne
- Â Rebecca 1 episode, 2006
- James Bachman
- Â Jeff 1 episode, 2007
- Brett Allen
- Â Donald 1 episode, 2007
- Richard Attlee
- Â Stephen Premel 1 episode, 2007
- Oliver Chris
- Â Daniel Carey 1 episode, 2006
- Jim Alexander
- Â Rupert 1 episode, 2006
- Rachel Bavidge
- Â Stressed Woman 1 episode, 2006
- Sarah Hadland
- Â Margaret 1 episode, 2007
- Silas Carson
- Â Derek 1 episode, 2007
- Ash Atalla
- Â Rampant Gay Man 1 episode, 2007
- Claudia Harrison
- Â Delina 1 episode, 2008
- Paul Bazely
- Â Michael 1 episode, 2008
- Lucy Robinson
- Â June 1 episode, 2008
- Lucy Montgomery
- Â April 1 episode, 2008
- Alexandra Weaver
- Â Kimberly 1 episode, 2008
- Nathalie Cox
- Â Julia 1 episode, 2010
- Joanna Bobin
- Â Journalist 1 episode, 2010
- Kevin Cecil
- Â Norman 1 episode, 2010
- Frances Barber
- Â Doctor Mendall 1 episode, 2006
- Adam Buxton
- Â Bill Crouse 1 episode, 2006
- Carsten Hayes
- Â Waiter 1 episode, 2006
- Nicholas Burns
- Â Jerome 1 episode, 2007
- Andrew Brooke
- Â Policeman 1 episode, 2007
- Orla Hannon
- Â Mother 1 episode, 2007
- Cavan Clerkin
- Â Dan 1 episode, 2008
- Ty Glaser
- Â Nadine 1 episode, 2008
- Suzanne Toase
- Â Alison 1 episode, 2008
- Sophie Colquhoun
- Â Nikki 1 episode, 2010
- Guy Henry
- Â Lawyer 1 episode, 2010
- Hermione Gulliford
- Â Linda 1 episode, 2010
- Mark Chatterton
- Â Jeremy 1 episode, 2010
- Charlie Baker
- Â Phil 1 episode, 2010
- Rachel Parris
- Â Alice 1 episode, 2013
- Alice Lowe
- Â Patricia 1 episode, 2006
- Susannah Wise
- Â Samantha 1 episode, 2006
- Laura Pyper
- Â Laura 1 episode, 2006
- Toby Longworth
- Â Dr. Julian Holmes 1 episode, 2006
- Amelia Bullmore
- Â Helen Buley 1 episode, 2007
- Alex Macqueen
- Â Vicar 1 episode, 2007
- Orlando Seale
- Â Peter File 1 episode, 2007
- Richard Cambridge
- Â Bad Guy 1 episode, 2007
- Janet Whiteside
- Â Olive 1 episode, 2008
- Jon Foster
- Â Barry 1 episode, 2008
- James Tovell
- Â Terry 1 episode, 2008
- Ralph Ineson
- Â Paul the Masseuse 1 episode, 2010
- Kevin Eldon
- Â French Tech Support 1 episode, 2010
- David Crow
- Â Negative One 1 episode, 2010
- Martino Lazzeri
- Â Bernatelli 1 episode, 2010
- Simon Snashall
- Â John 2 1 episode, 2010
- Cristian Solimeno
- Â Juan the Barista 1 episode, 2013
- Cheryl Fergison
- Â Judy 1 episode, 2006
- Chris Tarrant
- Â Chris Tarrant 1 episode, 2006
- Pamela Lyne
- Â Old Lady 1 episode, 2006
- Lydia Fox
- Â Laura 1 episode, 2007
- Catherine Shepherd
- Â Jessica 1 episode, 2007
- Gerald Lepkowski
- Â Jorg 1 episode, 2007
- Gemma Cousins
- Â BBC Woman 1 episode, 2007
- Hazel Douglas
- Â Joan 1 episode, 2008
- Jonathan Ryland
- Â Gary 1 episode, 2008
- Adam De Ville
- Â Greg 1 episode, 2008
- Derek Ezenagu
- Â Luke 1 episode, 2008
- Ed Weeks
- Â John 1 1 episode, 2010
- Susy Kane
- Â Female Bones 1 episode, 2010
- Marcus Garvey
- Â Bomb Disposal 1 episode, 2010
- Brian Limond
- Â Barry the Window Cleaner 1 episode, 2010
- Anthony Bishop
- Â Self - Sweet Billy Pilgrim 1 episode, 2010
- Gareth Morinan
- Â Troy the Barista 1 episode, 2013
- David Garfield
- Â Small Paul 1 episode, 2006
- Katie Males
- Â Shoe Shop Assistant 1 episode, 2006
- Philip Rham
- Â Johann 1 episode, 2007
- Adam G. Goodwin
- Â Barman 1 episode, 2007
- Adam Farr
- Â Peter 1 episode, 2007
- Tom Meeten
- Â Tramp 1 episode, 2008
- Hywel John
- Â Dave 1 episode, 2008
- Simon Kunz
- Â Judge 1 episode, 2010
- Chris Hayward
- Â Ben Genderson 1 episode, 2010
- Gresby Nash
- Â Alistair 1 episode, 2010
- Tim Elsenburg
- Â Self - Sweet Billy Pilgrim 1 episode, 2010
- Matt King
- Â Raymond Peterfellow 1 episode, 2013
- Nathan Harmer
- Â Sombre Guy 1 episode, 2006
- Takatsuna Mukai
- Â Translator 1 episode, 2006
- Peter Sullivan
- Â John 1 episode, 2007
- Gavin Keenan
- Â Singer 1 episode, 2007
- Laura Patch
- Â Tour Guide 1 episode, 2008
- Jacob Edwards
- Â Niall 1 episode, 2008
- Alexandra Roach
- Â Stenographer 1 episode, 2010
- Liam Hourican
- Â Security Guard 1 episode, 2010
- Karin Perathoner
- Â Club Receptionist 1 episode, 2010
- Alistair Hamer
- Â Self - Sweet Billy Pilgrim 1 episode, 2010
- Lucy Liemann
- Â Julie 1 episode, 2006
- Sarah Paul
- Â Nurse 1 episode, 2006
- Jamie Michie
- Â Philip 1 episode, 2007
- Kirsty Wark
- Â Kirsty Wark 1 episode, 2007
- Darren Strange
- Â Lawyer 1 episode, 2008
- Nicholas Sidi
- Â Lawyer 1 episode, 2010
- Adam Stevens
- Â Hoist Window Cleaner 1 episode, 2010
- Sanjeev Kohli
- Â Booth 1 episode, 2013
- Richard Pettyfer
- Â Fireman 1 episode, 2006
- Guy Porritt
- Â Policeman 1 episode, 2007
- Benedict Wong
- Â Prime 1 episode, 2010
- Marc Small
- Â Policeman 1 episode, 2010
- Simone McAullay
- Â Shop Assistant 1 episode, 2013
- Danny Wallace
- Â Cultural Advisor 1 episode, 2006
- David Schaal
- Â Dec 1 episode, 2007
- Gyles Brandreth
- Â Gyles Brandreth 1 episode, 2010
- Ashley McGuire
- Â Homeless Lady 1 episode, 2013
- Wendy Wason
- Â Woman in Lift 1 episode, 2006
- Adrian Schiller
- Â Judge 1 episode, 2007
- Rachel Riley
- Â Rachel Riley 1 episode, 2010
- Daniel Lawrence Taylor
- Â Ben 1 episode, 2013
- Jack Whitam
- Â Awful Man 1 episode, 2006
- Kim Wall
- Â Manager 1 episode, 2007
- Jeff Stelling
- Â Jeff Stelling 1 episode, 2010
- Giacomo Mancini
- Â Moses 1 episode, 2013
- Thaila Zucchi
- Â Sophia 1 episode, 2006
- Lorna Watson
- Â Milly 1 episode, 2007
- Alhaji Fofana
- Â Mayhem 1 episode, 2013
- Theo Gregory
- Â Anonymous 1 episode, 2013
- James Doherty
- Â Anonymous' Dad 1 episode, 2013
- Jon Snow
- Â Jon Snow 1 episode, 2013
- Tom Tremayne
- Â Office Junior (uncredited) 2 episodes, 2007
- Nigel Martin Davey
- Â Doodles - the Cleaner (uncredited) 1 episode, 2006
- Drew P.
- Â Stress Class Ponytail Guy (uncredited) 1 episode, 2006
- Simona Roman
- Â Paramedic (uncredited) 1 episode, 2007
- John Snowden
- Â Theatre Photographer (uncredited) 1 episode, 2007
- Stephen Lea Sheppard
- Â Calendar Geek (uncredited) 1 episode, 2008
- Adam Bond
- Â Bar Friend (uncredited) 1 episode, 2008
- Ritchie Singer
- Â Con (uncredited) 1 episode, 2008
- Anthony Harwood
- Â Cavorting Geek (uncredited) 1 episode, 2008
- Jim Lynn
- Â Calendar Geek (uncredited) 1 episode, 2008
- Tim Browse
- Â Calendar Geek (uncredited) 1 episode, 2008
- Rik Heywood
- Â Calendar Geek (uncredited) 1 episode, 2008
- Sean Sollé
- Â Calendar Geek (uncredited) 1 episode, 2008
- Nathan Robinson
- Â School Friend (uncredited) 1 episode, 2008
- Chris Wilson
- Â Police Officer (uncredited) 1 episode, 2010
- Mat Stace
- Â Club 8+ Member (uncredited) 1 episode, 2010
- David Golt
- Â Third Undertaker (uncredited) 1 episode, 2013