16 Celebs You Never Realized Were In Your Favorite Movies

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While it sometimes seems as if movie stars come out of nowhere to suddenly take over the industry, that's almost never the case. Even the most famous actors struggled for years with small roles before getting their big break, and some of their earliest parts were in super popular movies... except practically no one noticed. There are loads of celebs you never realized were in your favorite movies, and some of them will really surprise you.

The bulk of these appearances consist of actors early in their career, but that doesn't mean they're all kids. While some stars got their start when they were very young, others were adults when they got into acting. And like I said before, a lot of these would-be-stars worked hard for years and took whatever roles they could before finding one that made them a household name. There are also some stars on this list who were already established but took on a role that required them to be unrecognizable. Think Johnny Depp in 21 Jump Street. If he hadn't removed his disguise in that film, few would have recognized the actor during his surprising cameo.

So take a look below at 16 big stars who had roles in some of your favorite flicks, and see if you can actually remember seeing any of them.

1. Chris Hemsworth In 'Star Trek'

Before he was Thor, the Aussie actor had a brief role in this reboot playing James T. Kirk's (Chris Pine) dad.

2. Melissa McCarthy In 'Charlie's Angels'

The comedian briefly shows up in this action/comedy, where she fawns over — and then insults — Lucy Liu's character.

3. Matt Damon In 'Mystic Pizza'

Many fans think Damon got his start with 1997's Good Will Hunting, but he actually showed up nine years earlier in this cult favorite.

4. Nick Offerman In ‘Sin City’

That bleached blond badass is in fact Ron Swanson.

5. Miley Cyrus In 'Big Fish'

Before she was even Hannah Montana, a young Cyrus popped up in this fantasy film, where she was credited as "Destiny Cyrus."

6. Seth Rogen In ‘Anchorman’

This tiny role of cameraman helped keep Rogen busy with Judd Apatow in between Freaks & Geeks and Knocked Up.

7. Jonathan Banks In 'Airplane!'

The Breaking Bad star was in this classic comedy nearly three decades earlier — and he had hair.

8. Glenn Close In ‘Hook’

Yep, that bearded fellow is none other than the super famous actor.

9. Jonah Hill In 'The 40-Year-Old Virgin'

Before becoming a full-fledged member of the Apatow crew, Hill cameoed as a boy desperate for some sweet platform boots.

10. Elizabeth Banks In 'Spider-Man'

The future megastar portrayed Betty Brant in all three installments of the original Spidey trilogy.

11. Daniel Craig In ‘The Force Awakens’

The poor stormtrooper upon whom Rey plays the Jedi mind trick? Yep, that's James Bond.

11. Ellen Pompeo In 'Catch Me If You Can'

Pre-Meredith Grey, Pompeo was a flight attendant in this fun caper.

12. Elijah Wood In 'Back To The Future Part II'

That's little Frodo playing video games in pseudo future 2015.

13. Ryan Gosling In 'Remember The Titans'

Before "Hey, girl," Gosling was just another high school jock.

14. Joe Manganiello In 'Spider-Man'

That's a far less-jacked (yet still intimidating) version of the eventual Mr. Sofia Vergara portraying iconic comic book bully Flash Thompson.

15. Keira Knightley In 'Star Wars: The Phantom Menace'

Before her big break in Pirates of the Caribbean, Knightley had a small role in another huge franchise.

16. Ben Affleck In 'Buffy The Vampire Slayer'

Not exactly a meaty role, the future Batman was credited as "Basketball Player #10" in this cult classic.

As you can see, sometimes stars show up in the most unexpected places — like right under your nose in your favorite movie.