Scott Lang (Marvel Cinematic Universe)

Scott graduated from MIT with a degree in engineering, but turned to a life of crime to punish a corporation that had swindled its customers. While in prison, his wife Maggie divorced him and took custody of their daughter, Cassie.[lower-alpha 1]

In 2015, Scott is released to parole and moves in with his former cellmate, Luis. He visits Cassie unannounced, and is chastised by Maggie and her fiancé, police detective Jim Paxton, for not providing child support. Unable to hold down a job because of his criminal record, Scott agrees to join Luis and his crew in a burglary. Following a tip, Scott breaks into a house and cracks its safe, only to discover and steal an old motorcycle suit. When he tries it on, he shrinks to the size of an insect. He returns the suit to the house but is arrested and subsequently broken out of jail by the homeowner, Hank Pym.

Hank reveals that he had previously operated as the superhero named Ant-Man and had manipulated Scott into stealing the suit as a test. Hank reveals that he wants Scott to steal the Yellowjacket suit from his former protégé, Darren Cross, who has reverse-engineered Hank's technology. Hank and his daughter Hope van Dyne train Scott to fight, use the Ant-Man suit, and to control ants. Hank reveals that Hope's mother, Janet van Dyne, disappeared into the subatomic Quantum Realm while disabling a Soviet nuclear missile over 30 years prior. Hank warns Scott that he could suffer a similar fate if he overrides his suit's regulator.

Sent to steal a device from the Avengers Compound, Scott briefly fights and defeats Sam Wilson. Scott, along with his crew and a swarm of flying ants, infiltrates Pym Technologies' headquarters as Cross hosts a ceremony at the building to unveil his perfected Yellowjacket suit. Scott and Hope dispatch Hydra agents at the event and detonate explosives, imploding the building. Cross dons the Yellowjacket and takes Cassie hostage to lure Scott into a fight. Scott overrides the regulator and shrinks to subatomic size to penetrate Cross' suit and sabotages it, killing Cross. Scott disappears into the Quantum Realm, but manages to reverse the effects and returns to the macroscopic world. Out of gratitude, Paxton covers for Scott to keep him out of prison.

In 2016, Scott is recruited by Sam to help Steve Rogers, who has gone rogue in the wake of the implementation of the Sokovia Accords. Clint Barton and Wanda Maximoff pick Scott up and take him to join Steve, Sam, and Bucky Barnes at Leipzig/Halle Airport in Germany, where they are confronted by Tony Stark, Natasha Romanoff, James Rhodes, T'Challa, Peter Parker, and Vision. During the fight, Scott uses his suit to grow to an enormous size, allowing Steve and Bucky to escape. Scott is taken down by Parker, Stark, and Rhodey, and is captured by Thaddeus Ross and sent to the Raft floating prison alongside Wilson, Barton, and Wanda. They are later freed by Rogers and Romanoff, and Scott, alongside Barton, negotiate a deal with Ross and the U.S. government, receiving a term of house arrest.

In 2018, Scott learns he has unknowingly become entangled with Janet van Dyne after he receives an apparent message from her from the Quantum Realm. Scott contacts Hank about Janet, who along with Hope, kidnaps Scott, leaving a decoy so as not to arouse suspicion from FBI agent Jimmy Woo. They work to build a stable tunnel so they can take a vehicle into the Quantum Realm and retrieve her and arrange to buy a part needed for the tunnel from black market dealer Sonny Burch, who realizes the potential profit that can be earned from Hank's research and double-crosses them. Wasp fights off Burch and his men until she is attacked by a quantumly unstable masked woman. Scott tries to help fight off the woman, but she escapes with Hank's lab, which has been shrunk to the size of a suitcase. Hank's estranged former partner Bill Foster helps them locate the lab, where the "Ghost" captures the trio and reveals herself to be Ava Starr. Her father Elihas, another of Hank's former partners, died along with his wife during an experiment that caused Starr's unstable state.

Foster reveals that Starr is dying and in constant pain as a result of her condition, and they plan to cure her using Janet's quantum energy. Believing that this will kill Janet, Hank refuses to help them and escapes with Hope, Scott, and the lab. Opening a stable version of the tunnel, Hank, Hope, and Scott are able to contact Janet, who gives them a precise location to find her but warns that they only have two hours before the unstable nature of the realm separates them. Scott returns home before Woo arrives, while Hank and Hope are arrested by the FBI, allowing Starr to take the lab. Scott breaks Hank and Hope out of custody and they recover the lab with Luis' help. Starr, Burch and his men attack, but Hank and Janet return safely from the Quantum Realm, and Janet voluntarily gifts some of her energy to Starr to temporarily stabilize her. Scott returns home once again, in time for a now suspicious Woo to release him from house arrest.

Later, using a smaller quantum tunnel built in Luis' van, Hank, Janet, Hope and Scott plan to harvest quantum energy to help Starr remain stable. However, while Scott is in the Quantum Realm, he suddenly becomes trapped.

In 2023, Scott is released from the Quantum Realm after a rat inadvertently activates the quantum tunnel and he finds himself in a storage warehouse. He soon learns about the Blip, and rushes to Cassie's house and finds she is still alive. After being informed of what happened, Scott arrives at the Avengers Compound. He explains to Rogers and Romanoff that he experienced only five hours within the Quantum Realm, theorizing it could serve as a means of time travel. The trio visit Stark at his house to explain their plan for a "Time Heist" to steal the Infinity Stones from alternate timelines and use them to undo the Blip, but Stark refuses. They then meet with Bruce Banner at a diner and he agrees to help them at the Compound. However, their initial attempts at time travel are unsuccessful, and Scott is turned into a baby, child, and elderly man. Stark later relents and arrives to assist.

Once Thor, Rocket Raccoon, Nebula, Rhodes, and Barton return to the Compound, they formulate a plan. Scott joins Banner, Rogers and Stark, arriving in New York City during Loki's invasion in 2012. Scott's attempt to steal the Space Stone goes awry, requiring Rogers and Stark to travel to another universe in 1970 and retrieve both the Space Stone and additional Pym Particles. Banner then successfully restores the trillions of lost lives. However, an alternate Thanos from 2014 arrives and launches an attack. After saving Rocket, Banner, and Rhodes from drowning, Scott then participates in the final battle against Thanos and his army, while reuniting with a restored Hope. Scott kills Cull Obsidian during the battle. After Stark sacrifices his life to save them, Scott returns home and spends time with Hope and Cassie. About a week later, Scott, along with Hope and a restored Hank and Janet, attend Tony's funeral.

In 2025, Scott has written and released a memoir titled Look Out for the Little Guy. In 2026, as he walks throughout the city, he gets recognized and greeted by strangers and when going to coffee shops or restaurants, store patrons or other people pay for him. He also has maintained a friendship with Woo. After a book signing at a bookstore, he gets notified by the SFPD and goes to the station to get Cassie, who had shrunken a police car while trying to help a Blip-displaced homeless camp. They then return to Pym's house and have dinner where Cassie reveals that she, Hope and Hank have been working together on a quantum satellite in the basement.

Upon opening the satellite, a portal opens and Hank and Janet are pulled into the Quantum Realm. Hope, Cassie, Scott also go in after them. Scott and Cassie are separated from the others and run across different species of beings that live in the quantum realm. Scott is told that someone is looking for him because of his association with Janet and is eventually caught by soldiers and Darren Cross, who had survived their previous encounter and became a mutated, cybernetically enhanced individual with an oversized head known as M.O.D.O.K. Scott and Cassie are placed in prison holding cells and eventually are met by Kang the Conqueror.

Kang interrogates Scott, revealing he needs him to reclaim a multiversal power core that powers his ship which will allow Kang to escape the quantum realm. Scott initially refuses, but later makes a deal with Kang in order to spare Cassie's life. While trying to get the multiversal core, Scott meets many other variants of himself. Scott, with the help of Hope, shrinks the engine down to its normal size.

Kang forcefully takes the engine from Scott without giving back Cassie, breaking their deal, and begins to try to make his escape. After Scott and Hope try to fight back, Kang knocks them out. Hank shows up with ants that have lived in the quantum realm and as a result have grown much smarter with their tech. Scott, Hope, and Hank then make their way to Kang's empire to try to prevent him from escaping and to save Cassie.

Scott engages into a brief fight with Kang until the ants swarm Kang, allowing Scott to have enough time to stop the ship from powering up. Janet is able to open a portal for them to escape, but before Scott can make it through he is confronted by Kang. Kang overpowers Scott and nearly kills him, but is saved by Hope and the two of them knock Kang into the engine, seemingly killing him. Scott and Hope then make their way through the portal and out the quantum realm.

Days later, Scott returns to normal life, but becomes paranoid and thinks back to when Kang said he was preventing something worse from happening and begins to question if Kang is really dead or if he may have accidentally caused something worse to happen, only for him to happily shrug it off.

In an alternate 2018, following Janet van Dyne and Hank Pym's return from the Quantum Realm, Scott is attacked and turned into a zombie by the pair, who have been infected with a zombie quantum virus. Later, Vision finds the zombified Scott and takes him to Camp Lehigh, where he cures him with the Mind Stone; however, Vision is only able to preserve Scott's head in a jar. When a group of survivors arrive at the camp, Scott is aided by the Cloak of Levitation and escapes with Peter Parker and T'Challa to Wakanda.

In 2025, Scott, from the 616 universe, is brought back into the Quantum Realm and is tasked by Kang the Conqueror to retrieve a Multiversal power core using his Pym Particles discs. As 616 Scott enters the Quantum nexus, he encounters a probability storm, where he meets infinite variants of himself, with one Scott having never become Ant-Man and just been a Baskin Robbins employee, and another Scott in giant form unravelling into ribbons to his death.