Alan Tudyk

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'Hoban 'Wash' Washburne' in Firefly and Serenity

'K2-S0' (voice) in Rogue One: A Star Wars Story

'Mr Priest' in Dirk Gently's Holistic Detective Agency

'Dangerboat' (voice) in The Tick
'Alistair Krei' (voice) in Big Hero 6

'Duke' (voice) in Frozen

'King Candy' (voice) in Wreck-It Ralph

'Alpha' in Dollhouse

'Tucker' in Tucker and Dale vs Evil

Mickey (voice) in Halo 3 ODST

Dale Maddox in V

Jack in Knocked Up

'Sonny' (voice) in I, Robot

'Wat in A Knights Tale

Summer Glau

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'River Tam' in Firefly & Serenity

'Isobel Rochev' in Arrow

'Greta' in Chuck

'Orwell' in The Cape

'Skylar Adams' in Alphas

'Maggie Hoaplii' in Hawaii Five-0

'Bennett Halverson' in Dollhouse

'Cameron Phillips' in Terminator : The Sarah Connor Chronicles

'Tess Doerner' in The 4400

'Prima Ballerina' in Angel

Adam Baldwin

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'Animal Mother' in Full Metal Jacket
'Garber' in Predator 2
'Tom McLaury' in Wyatt Earp
'Major Mitchell' in Independence Day
'Knowle Rohrer' in The X Files
'Jayne Cobb' in Firefly / Serenity
'Colonel Dave Dixon' in Stargate SG-1
'Marcus Hamilton' in Angel
'Kal'Reegar' (voice) in Mass Effect 2
'Dutch' (voice) in Halo 3:ODST
'John Casey' in Chuck
'Det Ethan Slaughter' in Castle
'Mike Slattery' in The Last Ship

Jewel Staite

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'Kaylee Frye' in Firefly / Serenity
'Dr Jennifer Keller' in Stargate: Atlantis
'Amy Jacobs' in The X-Files
'Caroline Swift' in The Killing
'Dr Bryce' in Legends of Tomorrow
'Erin Cherloff' in Castle

Nathan Fillion

IMDB Page

'Captain Malcolm Reynolds' in Firefly & Serenity
'Captain Hammer' in Dr Horrible's Sing-Along Blog
'Richard Castle' in Castle
'Hermes' in Percy Jackson:Sea of Monsters
'Gunnery Sgt Buck / Sgt Reynolds' (voice) in Halo: Reach and Halo 3 / Halo 3:ODST and Halo 5
'Cayde-6' (voice) in Destiny / Destiny 2
'Dr Adam Mayfair' in Desperate Housewives
'Kevin Callis' in Lost
'Gao the Lesser' (voice) in Jade Empire
'Caleb' in Buffy the Vampire Slayer
'Minnesota Ryan' in Saving Private Ryan
'Dogberry' in Much Ado About Nothing
'Johnny' (voice) in Monsters University

I.love.this.man.
He is pretty much top of my want-to-meet list but at least I took this, a few years back.  only knew him as Caleb from Buffy at the time. Alan Tudyk was sat next to him but sob! I hadn't seen Firefly yet so I HAD NO IDEA OF THEIR AWESOMENESS.