We asked members of the BuzzFeed Community to tell us which celebs they've spotted in TV shows before they became famous. Here are the ones you probably didn't know about:
1. Before starring as Dwight on The Office, Rainn Wilson played a demon alchemist on Charmed.
The WB
2. Pretty Little Liars star Shay Mitchell once appeared as a model on Degrassi: The Next Generation.
CTV
4. And later that season of Scandal, 13 Reasons Why actor Dylan Minnette played President Fitz's teenage son for several episodes.
ABC
Episodes: "Mama Said Knock You Out," Season 3, Episode 15, plus five additional episodes.
Year: 2014
5. Lord of the Rings star Orlando Bloom was once a womanizing thief on Midsomer Murders.
ITV
6. Jane the Virgin actor Gina Rodriguez appeared on The Mentalist as the cousin of a victim.
CBS
7. Before doing "Carpool Karaoke" segments on The Late Late Show with James Corden, the host played a Colchester man who rents a flat to the Doctor in Doctor Who.
BBC
Episodes: "The Lodger," Season 5, Episode 11 and "Closing Time," Season 6, Episode 12
Year: 2010 and 2011
8. And on a different season of Doctor Who (with a different Doctor), The Amazing Spider-Man's Andrew Garfield played a 1930s New Yorker.
BBC
Episodes: "Daleks in Manhattan," Season 3, Episode 4 and "Evolution of the Daleks," Season 3, Episode 5
Year: 2007
9. Tiffany Haddish played a museum tour guide on That's So Raven before making everyone laugh in Girls Trip.
Disney
10. Grey's Anatomy star Ellen Pompeo was cast as an old college classmate of Ross and Chandler's on Friends.
NBC
11. The Office actor Leslie David Baker played a janitor on That '70s Show back in the day.
Fox
12. Before joining the royal family, Meghan Markle played a murderer on Castle.
ABC
14. In his very first role, Matthew McConaughey portrayed murder victim Larry Dickens in a reenactment on Unsolved Mysteries.
NBC
15. American Horror Story star Evan Peters once played a friend of Phil's in several episodes of Phil of the Future.
Disney
17. Before starring on This Is Us, Sterling K. Brown played a hospital lawyer on ER.
NBC
18. Millie Bobby Brown had her bike stolen by Manny on Modern Family long before she was fighting demogorgons on Stranger Things.
ABC
19. Hasan Minhaj once played a medical student on Arrested Development before appearing on The Daily Show with Trevor Noah.
Netflix
20. Zac Efron was cast in his very first role as a young Dr. Simon Tam in an episode of Firefly before his High School Musical days.
Fox
21. Brooklyn Nine-Nine actor Melissa Fumero once played one of Blair's minions on Gossip Girl.
The CW
22. A Star is Born director Bradley Cooper played a sexy smoker interested in Carrie on Sex and the City, in his very first role.
HBO
23. Dakota Johnson played Kevin's replacement in the series finale of The Office before going on to star in Fifty Shades of Grey.
Fox
24. X-Men star Jennifer Lawrence got her start playing a school mascot on Monk.
USA
25. Bohemian Rhapsody actor Rami Malek once starred as a student on Gilmore Girls in his first role.
The WB
26. Jeremy Renner played a vampire on Angel before joining The Avengers.
The WB
27. Before she was Captain Marvel, Brie Larson played a student interested in Abed on Community.
NBC
Episodes: "Herstory of Dance," Season 4, Episode 8, plus two others.
Year: 2013
28. Little Women actor Timothée Chalamet portrayed the vice president's son on Homeland.
Showtime
29. Pedro Pascal was turned into a vampire on Buffy the Vampire Slayer before starring on Game of Thrones.
The WB
30. Model Emily Ratajkowski once played Gibby's girlfriend on iCarly, before acting in Gone Girl and I Feel Pretty.
Nickelodeon
Episodes: "iSpeed Date," Season 3, Episode 3 and "iEnrage Gibby," Season 3, Episode 11
Year: 2009
31. Sharp Objects star Amy Adams was cast in Smallville as a girl who craved body fat after committing to a diet of meteor-infested veggies.
The WB
32. Before solving weird-ass crimes on Riverdale, Lili Reinhart played a teenage murderer on Law & Order: SVU.
NBC
33. Chris Hemsworth appeared in The Saddle Club long before he was cast as Thor.
ABC
34. X-Men actor James McAvoy once played a soldier on Band of Brothers.
HBO
35. Very early into his career, All My Children star Mark Consuelos was a cop who pulled Rachel over on Friends.
NBC