21 Famous People You Probably Forgot Were On "The Office"

Who he played: Luke — Michael's lazy and annoying nephew

Where you know him from: He's played a TON of roles on American Horror Story and appeared as Quicksilver in the X-Men franchise.

Who he played: The Finger Lakes Guy

Where you know him from: He's a comedic legend and has starred in movies like Ace Ventura, Dumb & Dumber, Eternal Sunshine of the Spotless Mind, Bruce Almighty, The Truman Show, and many more.

Who she played: Katy — A salesperson who came to Dunder Mifflin to sell handbags and then dated Jim

Where you know her from: She's been nominated for a ton of awards for her performances in Vice, Arrival, Sharp Objects, American Hustle, and Big Eyes.

Who she played: Dakota — The accountant who replaced Kevin

Where you know her from: She played Anastasia Steele in the Fifty Shades of Grey trilogy.

Who he played: Charles Miner — Dunder Mifflin's vice president of Northeast sales

Where you know him from: He's been in critically acclaimed shows like The Wire and Luther, and hit movies like Pacific Rim, Thor: Ragnarok, Beasts of No Nation, Avengers: Infinity War, and Cats.

Who he played: Walter Bernard Jr. — Andy's younger brother

Where you know him from: He's a singer-songwriter and has released eight studio albums.

Who she played: Erin's biological mom

Where you know her from: She's been in acclaimed movies like Working Girl and In & Out, she was a cast member on SNL in 1985, and she played Sheila in the TV series Shameless.

Who she played: Penny Beesly — Pam's sister

Where you know her from: She's best known for her roles in Pitch Perfect, The Help, Good Girls Revolt, and True Blood.

Who he played: Merv Bronte — A very paranoid guy who interviewed for the regional manager position

Where you know him from: He starred in Everybody Loves Raymond.

Who he played: Bill — A student in Michael's improv class

Where you know him from: He's been on shows like Community and Dr. Ken, and starred in The Hangover trilogy. He's also currently a judge on The Masked Singer!

Who she played: Jo Bennett — The CEO of Sabre

Where you know her from: She's best known for her roles in Misery, Dolores Claiborne, The Waterboy, Fried Green Tomatoes, and Titanic.

Who he played: Danny Cordray

Where you know him from: He was in movies like Scream 2, Crazies, Once Upon a Time in Hollywood, and Live Free or Die Hard, and has appeared on TV in Santa Clarita Diet, Deadwood, and Justified.

Who she played: Paris — Dwight's coworker at Staples

Where you know her from: She's best known for her roles in Community, Drake & Josh, The Odd Couple, and Mom.

Who he played: Mark — A manager with strikingly similar behavior to Michael Scott

Where you know him from: He's best known for his portrayal of Saul Goodman in Breaking Bad and Better Call Saul.

Who he played: A rude delivery kid

Where you know him from: He played Artie on Glee and was formerly a member of the boy band NLT.

Who he played: Christian — An important client Michael and Jan met with at Chili's

Where you know him from: He's best known for his roles on Saturday Night Live, Schooled, and Curb Your Enthusiasm. He also played Principal Duvall in Mean Girls.

Who he played: An interviewee for the regional manager position

Where you know him from: He's a philanthropist and CEO of Berkshire Hathaway.

Who he played: An animal trainer

Where you know him from: He's an actor and director. He played Mr. Pool on Sabrina the Teenage Witch and he created the show Freaks and Geeks. He's also directed movies and TV episodes, including Bridesmaids, A Simple Favor, Parks and Recreation, Mad Men, and many more.

Who he played: Fred Henry — An interviewee for the regional manager position

Where you know him from: He's best known for his roles in Arrested Development, BoJack Horseman, Blades of Glory, Hot Rod, and 30 Rock.

Who she played: The mother of the little girl who beat up Andy

Where you know her from: She's a stand-up comedian who's been nominated for several Grammys for her comedy albums.

Who he played: David Brent

Where you know him from: He's a comedian who created the UK version of The Office and helped produce the US adaptation. He also created and starred in The Ricky Gervais show.