THEN AND NOW: 'The Falcon and the Winter Soldier' stars before they were famous

The hit film also starred Eminem and drew on his real-life music career. Mackie played a rapper named Papa Doc.

After starring in "8 Mile," Mackie appeared on shows like "Law & Order: Criminal Intent" and films like "Million Dollar Baby" and "Brother to Brother."

Mackie's part as a soldier named JT Sanborn in 2008's "The Hurt Locker" (which starred future MCU costar Jeremy Renner), was considered to be his breakout role that led to wider recognition.

He also played Tupac Shakur in "Notorious" and appeared in a 2011 romantic comedy called "What's Your Number?" with Marvel costar Chris Evans.

The actor made his debut as Sam Wilson/Falcon in 2014's "Captain America: The Winter Soldier." He met Steve Rogers/Captain America in Washington, DC during early morning jogs — which spawned their signature phrase "On your left."

He reprised the role for "Avengers: Age of Ultron," "Ant-Man," "Captain America: Civil War," and "Avengers: Infinity War." His character vanished in "Infinity War" due to Thanos' snap, but he returned in "Avengers: Endgame."

"TFATWS" explores the theme of legacy, and who — if anyone — should take up the mantle of Captain America now that Evans' super-soldier has retired.

He played a teen named Justin Capshaw, a sniper with a complicated family history.

Stan later portrayed Carter Baizen on "Gossip Girl" and played Jefferson, the Mad Hatter, on ABC's "Once Upon a Time."

Stan was introduced to fans as Steve Rogers' childhood best friend in 2011's "Captain America: The First Avenger." He served in WWII, was captured by Hydra, and then experimented on. Bucky was believed to be dead after he fell from a train during a fight.

"Captain America: The Winter Soldier," saw him return as a brainwashed assassin, who was rescued by Hydra, given a new metal arm to replace the severed limb, and trained to be the "new face of Hydra."

In "Captain America: Civil War," he was the subject of further brainwashing by villain Helmut/Baron Zemo.

In Wakanda, Bucky was healed and given a new vibranium arm. Then he appeared in "Avengers: Infinity War" to fight alongside the Avengers in the fight against Thanos.

The end of "Avengers: Endgame" set up his role on "TFATWS."

The latest Marvel series shows Bucky trying to reacquaint himself with modern civilian life while struggling with the after-effects of his previous torment.

His first-ever role was on the German soap opera "Verbotene Liebe" in the '90s. He also appeared on shows like "Freunde fürs Leben" and the movie "Good Bye, Lenin!"

Then he took on roles in action films like "The Bourne Ultimatum" and "Inglourious Basterds."

Brühl portrayed real-life Formula 1 driver Niki Lauda in the 2013 movie "Rush," alongside Marvel star Chris Hemsworth. Three years later, he made his first appearance as Zemo in the MCU in "Captain America: Civil War."

"Civil War" showed Zemo pitting the Avengers against each other, the superheroes who he sought revenge on after learning that they were responsible for the death of his family in Sokovia in "Age of Ultron."

Zemo also further brainwashed Bucky.

He was last seen getting arrested for his crimes and being put in a containment cell.

Trailers for "TFATWS" teased the return of Zemo, wearing a comic-book-accurate costume.

She played Peggy Gregory on season seven of the show. VanCamp also played a young version of Jackie Onassis (née Bouvier) in a TV movie called "Jackie Bouvier Kennedy Onassis."

Throughout the early 2000s, VanCamp starred on several series, some of which landed longer than others.

She played Sam Dolan on the short-lived WB mystery series "Glory Days." Her big break came when she was cast on the four-season drama "Everwood," which also starred Chris Pratt.

VanCamp also guest-starred on "Law & Order: Special Victims Unit" and portrayed Rebecca Harper on "Brothers & Sisters."

The Canadian actress became more popular when she starred on the ABC drama "Revenge," which lasted for four seasons between 2011 and 2015.

VanCamp first appeared in the MCU in "Captain America: The Winter Soldier." She was introduced as Agent 13 from S.H.I.E.L.D. and was assigned to protect Steve Rogers.

In "Civil War," Sharon returned and revealed that she's the great-niece of Peggy Carter. She assisted Steve and his team in the movie, and the two kissed.

Sharon was last seen going on the run from the government.

Wyatt Russell followed in parents Kurt Russell and Goldie Hawn's footsteps by also becoming an actor.

Throughout the 2010s, he appeared on "Law & Order: LA," "Cowboys & Aliens," "Arrested Development," and "22 Jump Street."

Russell also starred on a season three episode of "Black Mirror" and appeared in the 2017 movie "Ingrid Goes West" with Marvel stars Elizabeth Olsen and Pom Klementieff.

At the end of episode one, a government official announced that the department of defense and the commander-in-chief approved the new hero.

The new Cap is supposed to embody America's greatest values, be a symbol for the public, and inspire disheartened people.

Comic-book fans know that John Walker took on the identity of Super-Patriot before becoming the new Cap. He later took on the moniker US Agent.

He appeared in a flashback during episode eight. Ramirez also had recurring roles on Fox's "The Gifted" and Netflix's "On My Block."

He made his film debut in the 2018 action movie "Assassination Nation," which also starred Bella Thorne and Bill Skarsgard.

He works closely with Sam and sets out to learn more about a threatening group called the Flag-Smashers.

In the comics, Joaquin had a similar role as Sam's right-hand man. He became the new Falcon after Sam took on the role of Captain America.

It's unclear how much "TFATWS" will draw from the comics, but the show could be setting up a major role for Joaquin in the MCU.

In the early 2000s, Oduye landed parts on "Law & Order," "Law & Order: Criminal Intent," and shirt films like "Water."

The actress also played Annelle in a TV-movie remake of "Steel Magnolias" and starred as Eliza in the Oscar-winning film "12 Years a Slave."

On the first episode, fans learn that Sarah is a widow and has two sons. She lives in Louisiana and runs Wilson Family Seafood.

It was also revealed that Sam and Sarah's parents are dead. Their names, Paul and Darlene, are written on the family boat that Sarah wants to sell.

Kellyman also starred as a marauder named Enfys Nest in 2018's "Solo: A Star Wars Story."

The British actress has also appeared in the TV miniseries "Les Misérables," "Don't Forget the Driver," and "Life."

She briefly appeared in the season premiere, wearing a Flag-Smasher mask and distributing the mask to followers on a street outside a bank in Switzerland.

The Flag-Smashers believe that the world was better before the blip and they want a world that's "unified without borders" — a message that's resonating with people in a time of chaos.

The trailers for "TFATWS" showed that Karli will be involved in fights against Sam and Bucky.

Karli appears to be a gender-flipped version of Karl Morgenthau from the comics, who was the leader of the Flag-Smashers.

One of her earliest roles was playing a secretary named Alice Baxter in the 1988 movie "Working Girl."

Aquino also appeared on shows like "One of the Boys," "Law & Order," and "Roseanne."

Throughout the '90s, she starred on series like "Brooklyn Bridge," "Madman of the People," and "Picket Fences." Perhaps most notably, Aquino portrayed Dr. Janet Coburn on the medical drama "ER."

Based on the trailers, it looks like she'll also work with Sam at some point in the series.

On the first episode of "TFATWS," it was revealed that she has been regularly meeting with Bucky for sessions. Going to therapy was a condition of Bucky's pardon and, given his violent history, the government wants to be warned if there are any indications of him acting out again.

Dr. Raynor herself was a soldier and relates to Bucky because she knows what it's like to be alone.