1. Clifton Collins, Jr.
What, who?: A chameleon-esque character actor with close to 100 acting credits, big and small, across film, TV, and video games.
What do I know him from?: As the brainy technician in Pacific Rim, ex-con Perry Smith in Capote, and a golden-gun-wielding gangster in Crank 2: High Voltage.
2. Richard Jenkins
What, who?: A seasoned vet of both the big and small screen, with 104 acting credits — and an Academy Award nomination — under his belt.
What do I know him from?: As one of the quirky senior techs in Cabin in the Woods, Dale’s dad in Step Brothers, and the FBI director in The Kingdom.
3. Stephen Tobolowsky
What, who?: The hardest working showbiz star you’ve almost heard of, with 226 IMDb credits to his name.
What do I know him from?: As the dude Bill Murray punched in Groundhog Day, Commissioner Hugo Jarry in Deadwood, and Sammy Jankis in Memento.
4. Brendan Gleeson
What, who?: A towering Irish actor with 85 wildly diverse acting credits — including four from this year, and two more from 2015.
What do I know him from?: As Mad-Eye Moody in the Harry Potter films, “Monk” McGinn in Gangs of New York, and the ill-fated cabbie in 28 Days Later.
5. William Fichtner
What, who?: A steel-eyed character actor who’s slowly making steps into the spotlight, currently filming as the sinister Shredder in the upcoming Teenage Mutant Ninja Turtles reboot.
What do I know him from?: The cucumber-cool bank manager from The Dark Knight, Colonel William Sharp in Armageddon, and recurring TV producer Phil Yagoda on Entourage.
6. Margo Martindale
What, who?: A ubiquitous American actor with 88 credits to her name and a smile that can melt a nation’s heart.
What do I know her from?: Main character Dewey Cox’s mother in Walk Hard, Maggie’s mom in Million Dollar Baby, and an enthusiastic American tourist in Paris, je t’aime.
7. J.K. Simmons
What, who?: You can probably recognize his blustery voice from a mile away, but J.K. Simmons has steadily stolen scenes on and off the silver screen for the last 27 years.
What do I know him from?: As Daily Bugle editor J. Jonah Jameson in the original Spider-Man trilogy, Juno’s father in Juno, and as Aaron Eckhart’s boss in Thank You For Smoking.
8. James Cromwell
What, who?: Regularly dubbed “The King Of ‘That Guys,’” lanky James Cromwell towers over Hollywood’s titans with 165 acting credits — and counting.
What do I know him from?: As George H. W. Bush in Oliver Stone’s W., as the chief of the LAPD in L.A. Confidential, and as the loyal chauffeur in the Academy Award-winning The Artist.
9. Xander Berkeley
What, who?: One of the unsung kings of ’80s action movies, Berkeley somehow snuck into all your favorite films — with 211 IMDb credits under his belt — without even bragging about it.
What do I know him from?: John Connor’s foster dad in Terminator 2: Judgment Day, a public affairs official in Apollo 13, and a shady police officer in Kick-Ass.
10. Michael Ironside
What, who?: A dedicated method actor with over 220 acting credits on his impressive resume.
What do I know him from?: Navy pilot Jester in Top Gun, big bad Richter in Total Recall, and Lt. Jean Rasczak in Starship Troopers.
11. Ray Wise
What, who?: Known for his turn on David Lynch’s Twin Peaks, Wise has remained a film industry mainstay, with 198 credits — 15 of which are from this year alone — to his name.
What do I know him from?: The U.S. Secretary of State in X-Men: First Class, a mouthy gangster in the original RoboCop, and, of course, as Leland Palmer in Twin Peaks.
12. Bruce Davison
What, who?: An everyman actor with 203 acting roles — and two original feature films — on his expansive resume.
What do I know him from?: As the anti-mutant Senator Kelly in the X-Men films, Dr. Douglas Brooks in Lost, and the titular George Henderson in Harry and the Hendersons TV spin-off.