Here's a list of actors from Season 4 of Game of Thrones that I have seen on stage (Mostly London theatres)
This list is unfinished and may be modified from time to time
If you have your own list let me know and I will post a link here
Go to my Game of Thrones - Season 4 - Cast list used to make this list
01 - Jon Snow - Kit Harington - posh — Royal Court Theatre (2010)
02 - Gilly - Hannah Murray - Martine — Finborough Theatre (2014)
03 - Tywin Lannister - Charles Dance - Good — Donmar Warehouse (1999)
04 - Ygritte - Rose Leslie - Bedlam — Shakespeare's Globe (2010)
05 - Petyr 'Littlefinger' Baelish - Aidan Gillen - The Water Engine — Hampstead Theatre (1989)
06 - Margaery Tyrell - Natalie Dormer - 0.45 — Michael Frayn Space, Hampstead Theatre (2010)
07 - Davos Seaworth - Liam Cunningham - Goodnight Siobhan — Royal Court (1990)
08 - Alliser Thorne - Owen Teale - Berenice — Cottesloe Theatre (1990)
09 - Stannis Baratheon - Stephen Dillane - Long Day's Journey Into Night — Lyttelton Theatre (1991)
10 - Theon Greyjoy - Alfie Allen - The Spoils — Trafalgar Studios (2016)
11 - Janos Slynt - Dominic Carter - Macbeth — Tricycle Theatre (1995)
12 - Joffrey Baratheon - Jack Gleeson - Bears in Space — Soho Theatre Upstairs (2015)
13 - Grenn - Mark Stanley - Events While Guarding the Bofors Gun — Finborough Theatre (2012)
14 - Ramsay Snow - Iwan Rheon - Remembrance Day — Royal Court Upstairs (2011)
15 - Arya Stark - Maisie Williams - I and You — Hampstead Theatre (2018)
16 - Lord Varys - Conleth Hill - The Government Inspector — Tricycle Theatre (1994)
17 - Bronn - Jerome Flynn - Timon of Athens — Young Vic (1991)
18 - Pypar - Josef Altin - badnuff — Soho Theatre (2004)
19 - Jorah Mormont - Iain Glen - King Lear — Royal Court (1993)
20 - Olenna Tyrell - Diana Rigg - All for Love — Almeida Theatre (1991)
21 - Grand Maester Pycelle - Julian Glover - Julius Caesar — Barbican Theatre (1996)
22 - Barristan Selmy - Ian McElhinney - Carthaginians — Hampstead Theatre (1989)
23 - Karl Tanner - Burn Gorman - Green Man — Bush Theatre (2003)
24 - Tycho Nestoris - Mark Gatiss - The Recruiting Officer — Donmar Warehouse (2012)
25 - Lysa Arryn - Kate Dickie - Our Town — Almeida Theatre (2014)
26 - Selyse Baratheon - Tara Fitzgerald - Hamlet — Hackney Empire (1995)
27 - Mance Rayder - Ciarán Hinds - Simpatico — Royal Court (1995)
28 - Salladhor Saan - Lucian Msamati - ID — Almeida Theatre (2003)
29 - Ellaria Sand - Indira Varma - Othello — Cottesloe Theatre (1997)
30 - Grey Worm - Jacob Anderson - King Lear — Young Vic (2009)
31 - Roose Bolton - Michael McElhatton - Shining City — Royal Court Theatre (2004)
32 - Qyburn - Anton Lesser - Wild Oats — Lyttelton Theatre (1995)
33 - Yara Greyjoy - Gemma Whelan - Dark Vanilla Jungle — Soho Theatre (2014)
34 - Meera Reed - Ellie Kendrick - Romeo and Juliet — Shakespeare's Globe (2009)
35 - Three-Eyed Raven - Struan Rodger - Richard II — Cottesloe Theatre (1995)
36 - Podrick Payne - Daniel Portman - The Collector — The Vaults, Waterloo (2016)
37 - Hizdahr zo Loraq - Joel Fry - Public Enemy — Young Vic (2013)
38 - Myranda - Charlotte Hope - Buried Child — Trafalgar Studios (2016)
39 - Anya Waynwood - Paola Dionisotti - Richard II — Cottesloe Theatre (1995)
40 - Biter - Gerard Jordan - The Force of Change — Royal Court Theatre Upstairs (2000)
41 - Yohn Royce - Rupert Vansittart - Arsenic and Old Lace — Strand Theatre (2003)
42 - Great Master #1 - Emilio Doorgasingh - The Ramayana — Olivier Theatre (2001)
43 - Bolton Guard - Anthony Boyle - Harry Potter and the Cursed Child — Palace Theatre (2016)
44 - Morgan - Chris Reilly - 0.45 — Michael Frayn Space, Hampstead Theatre (2010)
45 - High Septon - Paul Bentley - Over the Moon — The Old Vic (2001)
46 - Fennesz - Trevor Allan Davies - Rosencrantz and Guildenstern are Dead — Theatre Royal Haymarket (2011)
47 - The Night King - Richard Brake - Camera Obscura — Almeida Rehearsal Room (2002)
48 - Morgan's Friend - Stuart Martin - Burnt by the Sun — Lyttelton Theatre (2012)
49 - Donnel Waynwood - Alisdair Simpson - The White Devil — The Pit (1996)
50 - Innkeeper - Martin Walsh - Hobson's Choice — Young Vic (2003)
51 - Lord Blackmont - Daniel Rabin - Ignorance/Jahiliyyah — Hampstead Theatre Downstairs (2012)
52 - Mole's Town Madam - Lu Corfield - The Girlfriend Experience — Royal Court Upstairs (2008)
53 - Ternesio Terys - Gary Oliver - The Comedy of Errors — Young Vic (1997)
54 - Mully - Andy Moore - Scenes from the Big Picture — Cottesloe Theatre (2003)
55 - Farmer Hamlet - Finbar Lynch - King Lear — Cottesloe Theatre (1997)
56 - Wight - Alice Hewkin - Kiki's Delivery Service — Southwark Playhouse (2016)
57 - King Joffrey Baratheon Dwarf - Raymond Griffiths - See How They Run — Richmond Theatre (2014)
58 - Guymon - Jem Wall - Richard II — Cottesloe Theatre (1995)
59 - Eddard 'Ned' Stark (archive footage) (uncredited) - Sean Bean - Killing the Cat — Royal Court Theatre Upstairs (1990)