<Li> Evangeline Lilly as Hope van Dyne: The daughter of Hank Pym and Janet van Dyne and a senior board member of Pym Technologies, who helps Darren Cross take over the company . Throughout the film, character progression brings Hope closer to becoming a hero . Lilly described her character as "capable, strong, and kick - ass", but said that being raised by two superheroes resulted in Hope being "a pretty screwed up human being...and the clear message sent by my name is that I'm not a big fan of my father and so I took my mother's name ." She added that van Dyne's "arc in the movie is trying to find a relationship" with Pym . Originally cast by Wright, Lilly was reluctant to take the role after he left the project until she read the revised script and got a chance to meet with Reed . Feige said that van Dyne was the more obvious choice to take up the mantle of Ant - Man, being "infinitely more capable of actually being a superhero" than Lang, and that the reason she does not is because of Pym's experience with losing her mother, rather than sexism, which Feige felt would not be a problem for Pym in modern times . Lilly signed a multi-film contract with Marvel . </Li> <Li> Corey Stoll as Darren Cross / Yellowjacket: A former protégé of Pym's, who takes over his mentor's company and militarizes a similar version of the Ant - Man technology to create the Yellowjacket suit . Stoll described the suit as "the next generation of Ant - Man's suit", with a sleeker, more militaristic look as "if Apple had designed a battle suit ." As for his character, Stoll said that Cross was more like Hank Pym than "Thanos or Loki, who are villains that know it", since Cross is a "brilliant scientist, who is not ethically pure" with shades of gray . Unlike Rudd, who wore a practical costume as Ant - Man, Stoll wore a motion capture suit while performing as Yellowjacket . Reed explained that this decision was made early on when creating and filming with a real Yellowjacket costume was found to be impractical . </Li> <Li> Bobby Cannavale as Paxton: A San Francisco Police Department officer who is engaged to Lang's former wife Maggie . Cannavale stated that Rudd and McKay convinced him to join the film during the rewriting process before Marvel approached him, saying, "They sort of pumped (my) part up a bit...I really went on good faith (taking the role) because they're so secretive (at Marvel) about the script . I just trusted them ." He also added that the process felt like an indie film instead of a large - scale blockbuster, and that he was able to improvise frequently along with the other actors . Patrick Wilson was originally cast in the role, before leaving the film because of scheduling conflicts brought on by the filming delay . </Li> <Li> Michael Peña as Luis: Lang's former cellmate and a member of his crew . Peña stated that he modeled Luis' vocal style and positive outlook on life "on a friend of a friend", saying, "That's just the way he talks and the cadence . He's got this grin on the entire time and he doesn't care . He's the kind of guy where you're like' Hey, what'd you do this weekend?' and he's like' I went to jail, dawg,' with a smile on his face . Not a lot of people do that . Not a lot of people think of life on those terms ." Peña signed a contract with Marvel for three films . </Li>

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