The MCU boasts a huge array of big stars.

But where did they get their start in the business?

After all, every superhero has an origin story.

JTT2120_v032.1130

© Marvel Studios 2019

From there, she steadily started booking guest-starring gigs on television and minor roles in feature films.

But the role ofCaptain Marvelis taking her higher, further, faster than ever before.

She began her career at quite a young age, making her feature film debut at 9 in 1994’sNorth.

THEN-AND-NOW-Avengers-Robert-Downey-Jr

NBC; Marvel

She became equally at home in Natasha Romanoff’s catsuit as she is in indie films and comedies.

Paul Rudd (Ant-Man)

We knowPaul Ruddseems ageless, but everyone starts somewhere.

He played a social worker in a group of Chicago-based friends.

THEN-AND-NOW-Avengers-Brie-Larson

NBC; Marvel

In 1995, Rudd made the jump to film as hunky stepbrother Josh inClueless.

But it was the 2006 remake ofWhen a Stranger Callsthat marked her feature film debut (pictured here).

She portrayed the terrorized heroine’s best friend, Scarlett.

THEN-AND-NOW-Avengers-Scarlett-Johansson

Hemsworth got his start where nearly every Australian actor does: on the long-running soapNeighbours.

But it’s Thor that made him a god among Hollywood men.

Chris Pratt (Star-Lord)

Before he was lovable smartass Peter Quill (a.k.a.

THEN-AND-NOW-Avengers-Paul-Rudd

Everett Collection; Marvel

Pratt also briefly joined the cast ofThe O.C.before breaking out in a bigger way onParks and Rec.

His true break came as Jackie Robinson in 2013’s42, and his star was on the rise ever since.

He was first seen as Black Panther in 2016’s star-studded threequelCaptain America: Civil War.

THEN-AND-NOW-Avengers-Tessa-Thompson

Everett Collection; Marvel

Renner first broke out in a major way as a bomb-disposal expert in the Oscar-winning movieThe Hurt Locker.

After early days as a civil-rights activist, Jackson studied drama at Morehouse College.

Jackson played Leeds, a local unimpressed with college students' anti-apartheid efforts.

THEN-AND-NOW-Avengers-Chris-Evans

Everett Collection; Marvel

But, even before that, he was laboring in minor roles in a string of films.

Her playEclipsedwent to Broadway in 2016 with fellowBlack PantheractressLupita Nyong’oin the leading role.

She continued to work steadily in British TV, appearing in larger roles onDoctor WhoandHumans.

THEN-AND-NOW-Avengers-Chris-Hemsworth

In 2017, she earned an Emmy nomination for her work onBlack Mirror.

But it’s the spirited Shuri who endeared her to millions.

He’s since become one of the most respected and sought-after actors of his generation.

THEN-AND-NOW-Avengers-Chris-Pratt

Everett Collection; Marvel

Her green-skinned warrior Gamora is arguably her most popular, though.

War Machine) inIron Man 2, and he’s been a well-respected Hollywood veteran for years.

In 2005, he was nominated for the Best Actor Oscar for his work in the historical dramaHotel Rwanda.

THEN-AND-NOW-Avengers-Chadwick-Boseman

ABC Family; Marvel

Since 2001, Diesel has led theFast & Furiousfilm franchise, which has spanned multiple decades.

He also had a long-running role as Will onAliasand then found great success inThe Hangovermovie trilogy.

Prior to playing Mantis inGuardians of the Galaxy Vol.

THEN-AND-NOW-Avengers-Sebastian-Stan

NBCU Photo Bank; ©Marvel Studios 2016

Klementieff made her Hollywood debut in 2013 withSpike Lee’s remake ofOldboy.

THEN-AND-NOW-Avengers-Jeremy-Renner

Everett Collection; Jay Maidment/Marvel Studios

THEN-AND-NOW-Avengers-Samuel-L.-Jackson

Everett Collection (2)

Avengers Elizabeth Olsen

Everett Collection; © Marvel Studios 2018

Avengers

Everett Collection; © Marvel Studios 2018

Avengers

Anchor Bay Entertainment; © Marvel Studios 2019

Avengers

Everett Collection; Chuck Zlotnick/© Marvel Studios 2018

Avengers

Tristan Hopkins/Channel 4; ©Marvel Studios 2018

Avengers

BBC; Chuck Zlotnick/©Marvel Studios 2018

Avengers

Columbia Pictures; Chuck Zlotnick/©Marvel Studios 2018

Avengers

HBO; Chuck Zlotnick/©Marvel Studios 2018

Avengers

Paramount Pictures; © Marvel Studios 2019

THEN-AND-NOW-Avengers-Paul-Bettany

Hook (screen grab) Gwyneth Paltrow Iron Man 3 (2013) Pepper Potts (Gwyneth Paltrow) CR: Zade Rosenthal/Disney

TriStar Pictures; Zade Rosenthal/Disney

Avengers first roles

Universal; Marvel Studios

Avengers first roles

Warner Brothers Television; Marvel Studios

Avengers first roles

Warner Brothers Television; Marvel Studios

Avengers first roles

Columbia Pictures; Marvel Studios

Avengers first roles

HBO; Marvel Studios

Pom Klementieff

IMDB; Marvel Studios