Casting the Movie of My Campaign

As a DM/GM/Referee, do you ever just tell your players something like "The man in front of you looks like Christopher Walken," or "The voice on the telephone sounds like Tim Curry," or some other celebrity-based shorthand description of an NPC? I might be lazy, but I've found it helpful to do it every once in a while. Therefore, I've decided to beat this idea like a thousand dead horses. If asked (or if the mood struck me), here are the celebrities/actors to whom I would compare many of the NPCs in the Lamentations of the Fallen Lords campaign.

NPCs the players have met:

• Frinabus Opyshan, Avatara, Chief Arbiter of Magic - John Malkovich
• Vorador Audron, Avatara, Chief Executor of the Emperor - Looks like Charles Dance, sounds like Paul Lukather's portrayal of Vorador from the Legacy of Kain games
• Joop van Ooms, Famous Artist - Christoph Waltz
• Gilles de Rais, Employee of Ooms - Michael Clarke Duncan
• Henry VIII, Employee of Ooms - Tim Roth (think Rob Roy)
• Uravulon Calcidius, Wizard and Stargazer - John Welsh (as the Emerald Seer from Krull)
• Klavis Garavone, Sculptor - Looks like John Hurt, sounds like that creepy guy who calls Heather in the hospital in Silent Hill 3 (voice actor uncredited)
• Barri, Employee of Garavone - Danny DeVito
• Ibofuris Onaxix, Colony Owner and Former Adventurer - Eva Green
• Sabina Ranta, Mayor of Tandem - Helen Mirren
• Richard Arnold, Scholar - Sam Neill
• Mistysparkles, Dark Lord of the Fey - Sounds like Richard Doyle's portrayal of Moebius from the Legacy of Kain games
• The Pale Lady - Looks like a super-pale version of Sheryl Lee with really long hair, sounds like Amanda Winn Lee's portrayal of Rei Ayanami from Neon Genesis Evangelion
• Orelia Woolcott, Revolutionary Witch - Karen Gillan
• Doctor Volt, Supervillain (from Lusus Naturae) - Christopher Mintz-Plasse
• Balin Brineswallow, Balloon Pilot - Jordan Prentice
• Lodowijk Franken, Mercenary (from The Undercroft #3) - James Woods
• Marco Bisset, Mercenary (from The Undercroft #3) - Julian Barratt
• Link, Linkboy - Looks like Thomas Brodie-Sangster, sounds like Yuri Lowenthal's portrayal of Dito from Drakengard 3
• Six Moon Running Jaguar, Journeyman - Mike Colter
• Six Moon Soaring Raven, Journeyman - Rosario Dawson

NPCs the players have yet to meet (This list is subject to change):

• Emperor Myrdred - Hugo Weaving
• Mevia Huharith, Avatara, Chief Magistrate of the Cath Bruig Realm - Carrie Fisher
• Roxen Elustra, Avatara, Overseer of the Legion and Heron Guards - Sigourney Weaver
• Nupraptor, Avatara, Chief Magistrate of Gower - Willem Dafoe
• Azimuth, Avatara, Chief Magistrate of the Province - Judi Dench
• Ariel, Avatara, Chief Commissioner of the Ermine - Anna Gunn (can you tell I like the Legacy of Kain series yet?)
• Dejoule, Avatara, Chief Commissioner of Forest Heart - Tilda Swinton
• Anarcrothe, Avatara, Chief Commissioner of the Dwarven Kingdom - Warwick Davis
• Vegdrasil, Dwarf King - Michael J. Anderson
• Archon Ivoldi, Governor of Myrgard - Zelda Rubinstein
• ka'Lemba, fir'Bolg King (which is a gender-neutral term in the Ermine) - Uma Thurman
• Ori, Inventor - Peter Dinklage
• Gira Gywon, Colony Owner - Mads Mikkelsen
• General Nine Serpent Bloody Sun, Leader of the Heron Guards - Danny Trejo
• General Cathal Malory, Imperator of the Legion - Laurence Fishburne
• Martad Mairtrighim, Chancellor of the Scholomance - Christopher Lee
• Corina Faulkner, Chancellor of the University of Covenant - Helena Bonham Carter 
• Acer Malum Magnus, Trow Emissary - Sounds like Tony Jay (you can never have too much Legacy of Kain)
• Oldgrowth, Forest Giant Emissary - Sounds like James Earl Jones
• Marie Harris, Rogue Warlock - Scarlett Johansson

Even if you never actually describe your NPCs to the players in terms of real-life look-alikes or sound-alikes, it might be helpful to keep a list of comparisons like this to help keep all of the characters' appearances and personalities straight. Besides, it can be fun to cast your ideal movie adaptation in your head; people seem to do it with books all the time.