Last updated: June 28, 2026·🔄 Guide reviewed and refreshed ahead of Halloween 2026.· By Seckin Peker

Halloween Costume Guide

Peggy Carter Halloween Costume Guide

She co-founded an intelligence agency. They made her do the filing first.
Avengers Hayley Atwell Badass Women British Military Soldier Spy Suit Vintage
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Quick Answer: The Peggy Carter Halloween costume is her SSR military green suit. Get the blazer and skirt right and everything else follows.
  • Military Green Blazer (essential)
  • Military Green Pencil Skirt (essential)
  • White Dress Shirt
  • Military Green Necktie
  • Eagle Pins
  • Eagle Badge Blazer Button Set
  • Brown Street Pump

Peggy Carter spends most of her screen time being the most capable person in rooms that refuse to promote her for it, then co-founds the intelligence agency those rooms work for. The military green blazer and pencil skirt together are the whole costume — without both pieces, you are dressed up but not dressed as anyone specific. Hayley Atwell plays Carter across six MCU films beginning with Captain America: The First Avenger (2011), making her the most frequently recurring secondary character in the franchise (Wikipedia). MCU fans will place the costume; anyone who only caught the main Avengers films might read it as a general 1940s military look until they spot the eagle badge details.

Items Total8 Items
DifficultyEasy
Vibe1940s Military Intelligence
Cost$40 – $200

Peggy Carter Halloween Costume Items

Peggy Carter Halloween costume infographic showing military green blazer, matching pencil skirt, white dress shirt, military green necktie, eagle pins, eagle badge button set, and brown street pumps

Peggy Carter Costume Items

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Peggy Carter Marvel Agent Carter SSR Military Costume
  • 1 Military Green Blazer (essential)This is the whole costume. Without a properly fitted blazer in the right shade of military green, nothing else on this list matters. Look for structured shoulders, a single-breasted cut, and a fit that sits close rather than boxy. If the shoulders are off, the 1940s officer silhouette collapses and the look reads as someone who grabbed a green jacket rather than someone who built a costume. Fit is the only thing worth spending time on here.
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  • 2 Military Green Pencil Skirt (essential)The blazer and skirt together are what make the silhouette readable as Peggy Carter rather than a general period costume. It needs to match the blazer in shade — a near-match that reads as two different greens undermines the whole suit effect. Knee-length or just below. Shorter than that and the 1940s line breaks entirely.
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  • 3 White Dress ShirtCrisp and fully buttoned, collar included. The collar and shirt front are visible above and between the blazer lapels, so anything wrinkled or loose will show. Check your closet before ordering.
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  • 4 Military Green NecktieKeeps the monochromatic green-on-green palette consistent. A four-in-hand knot sits smaller and flatter than a Windsor, which reads more period accurate and less like a modern office look.
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  • 5 Eagle PinsThese, alongside the badge buttons, are what make the costume recognizably SSR rather than just a green suit. Small detail, high impact. Pin them to the lapel after the blazer is on.
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  • 6 Eagle Badge Blazer Button SetReplace the blazer’s existing buttons with these before the party, not at it. Attach them while the blazer is flat on a surface and test each one with a tug before you put it on.
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  • 7 Brown Street PumpA mid-height heel in brown or tan. Check your closet before buying — any brown heel with a clean, unfussy silhouette works here.
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  • 8 Alternative: WW2 Military Suit Costume for WomenIncludes a jacket, skirt, hat, and belt in one purchase. The hat and belt are not in the individual item list and they add period detail the separate build skips. Fit will not be as precise as buying a tailored blazer and skirt, but if you are short on time or want the hat included, this is the faster route.
    See on Amazon
Hayley Atwell as Peggy Carter in her iconic military green SSR officer suit with eagle badge details, showing the fitted blazer and knee-length pencil skirt that anchor the Halloween costume build

How to Style the Peggy Carter Halloween Costume

The blazer shoulders are the first thing people read, and they need to land exactly at the edge of your shoulder. Too wide and the military officer becomes a woman in her dad’s jacket; too small and the blazer pulls across the back all night. The skirt length matters just as much — above the knee and the 1940s period read evaporates, leaving you in a green business suit rather than anything that connects to the character. The eagle badge buttons and pins are small, but without them the suit is just a suit.

Peggy Carter is briefed on an assignment, assessed by a room full of men who assume she is there to take notes, solves the problem they were all stuck on, and hands in the paperwork. Then she goes home and the next morning she does it again. There is no dramatic moment of proving herself. It just keeps happening, and she keeps doing the work anyway.

Size up when ordering the blazer online

Most structured blazers at this price point run tight in the shoulders and across the back. If you are between sizes, go up. A blazer that fits at the shoulders with a little room through the back looks intentional. One that pulls at the seams looks like a mistake. You can have a larger blazer taken in; you cannot let out a smaller one.

Do a button test before the party

The eagle badge button set replaces the blazer’s existing buttons. Some badge sets clip rather than thread, which means they can work loose over a few hours of wearing. Thread or attach all buttons fully, then tug each one. Do this the day before, not twenty minutes before you leave, so you have time to fix anything that does not hold.

Peggy Carter Group Halloween Costume Ideas

Couples Idea

Peggy Carter & Captain America (Marvel)

Excellent couple dynamic with genuine screen history and a visual contrast that works immediately. The military green suit against the red, white, and blue tactical look is recognizable at a glance, and most people in any crowd will have seen at least one of the films where this relationship plays out. The tragic angle — a dance they never got to have — is either a fun detail to explain or a way to make people slightly sad at a Halloween party. Both are valid.

Peggy Carter Captain America

Duo Idea

Peggy Carter & Captain Carter (Marvel — What If…?)

Strong duo concept, but it only lands with people who have watched What If…? The premise is the same woman in two timelines — one became the SSR officer, the other got the super soldier serum instead. Visually the contrast between the tailored green suit and the Captain Carter shield-and-armor look is striking. At a general party, expect to explain the alternate universe angle. At a Marvel crowd, expect immediate recognition.

Peggy Carter Captain Carter

Group Idea: Marvel’s Strongest Women

Peggy Carter, Captain Carter, Black Widow, Yelena Belova, Scarlet Witch

Strong group for a Marvel crowd. All five characters are recognizable to anyone who has followed the MCU, and the range of looks — a 1940s military suit, tactical gear, and full Scarlet Witch regalia — gives the group real visual variety. The weakest point is Captain Carter, who requires more commitment to the build than the others. Worth it if someone in the group already has the pieces.

Peggy Carter Captain Carter Black Widow Yelena Belova Scarlet Witch

Group Idea: Iconic Retro Women

Peggy Carter, Rosie the Riveter, Marilyn Monroe, Evelyn Carnahan, Lucy Ricardo

Might work, but the connective tissue here is thin. “Women from different decades who are vaguely vintage” is a concept, not a group. Peggy is 1940s British intelligence. Rosie the Riveter is 1940s American labor. Marilyn Monroe is 1950s glamour. Lucy Ricardo is 1950s TV comedy. Evelyn Carnahan is 1920s archaeology. They share nothing except a general era, and that only holds the group together for people who appreciate the theme over the characters. If your crowd is into the historical tourism angle, this works. If they are primarily MCU or film fans, it will not read as a coherent group.

Peggy Carter Rosie the Riveter Marilyn Monroe Evelyn Carnahan Lucy Ricardo
Marvel characters group Halloween costume lineup including female MCU heroes, showing the range of looks available for a Marvel-themed group costume with Peggy Carter

Peggy Carter Halloween Costume DIY Tips

Building the Look

Most of this build is thrift-friendly. The only items worth buying specifically are the eagle pins and badge buttons, because those are what make the costume character-specific rather than just a vintage suit.

  • Military green blazer: thrift stores are hit or miss on this shade. Military surplus stores are more reliable. The key is the shade — olive drab reads wrong, and too-bright green reads wrong. You want a muted, khaki-adjacent military green.
  • Pencil skirt: easier to thrift than the blazer, but shade-matching matters. Bring or photograph the blazer before buying a skirt separately to make sure they read as a suit.
  • White dress shirt: check your closet first.
  • Military green necktie: any dark or muted green tie you already own probably works. Skip it if you cannot find a reasonable match — the suit reads without it.
  • Eagle pins: buy these. Cheap and character-specific.
  • Badge buttons: buy these. Painting existing buttons gold is doable but fiddly, and the results are uneven.
  • Brown pumps: check your closet. Any brown or tan heel with a clean silhouette works.
  • Optional: a structured briefcase in brown or tan adds a prop with in-character meaning. Peggy’s concealed-weapon briefcase is a recurring visual in Agent Carter. It also gives you somewhere to put your phone.

Playing Peggy at the Party

Peggy Carter is not cold. She is not dramatic. She is precise and patient in a way that only comes from spending years being underestimated by people she has already lapped twice. That is the tone to aim for.

  • When someone asks who you are: “SSR. And you are?” Then wait. Let them fill the silence.
  • If someone explains something to you that you clearly already know, let them finish. Then solve the problem they just tried to explain.
  • She has a dry sense of humor that surfaces when she is mildly annoyed. It is not performative. It is just what comes out when she has reached the limit of what she is willing to pretend is not happening.
  • The briefcase prop, if you bring one, has a social function beyond looking accurate: it gives you something to do with your hands at a loud party and prompts the question “what is in the briefcase?” which is a better conversation starter than explaining the costume from scratch.
  • She says goodnight to people and means it. Small detail. Makes her feel more like a person than an archetype.

Peggy Carter Halloween Costume: FAQ

The military green blazer and pencil skirt are the foundation. Add a white dress shirt underneath, a military green necktie, eagle pins on the lapel, and eagle badge buttons on the blazer. Finish with brown street pumps. The suit does the recognition work; the accessories are what make it specifically Peggy Carter rather than a generic 1940s military look.

Yes, with one caveat. Peggy Carter appears across six MCU films spanning over a decade of releases, which keeps her in the conversation alongside the main Avengers lineup. People who watched only the original trilogy and skipped Agent Carter might read the suit as a general 1940s military look before connecting it to a specific character. The eagle badge details are what close that gap.

Hayley Atwell plays Peggy Carter across six MCU films and the Agent Carter TV series (IMDb). Emily Blunt was originally offered the role but turned it down.

The alternative WW2 Military Suit set comes with a jacket, skirt, hat, and belt in one purchase. The hat and belt add period detail the individual item list does not include. The fit will not be as refined as a properly sized blazer and skirt bought separately, but for a Halloween party the complete set works and saves you the shade-matching problem.

No. The suit does the recognition work without it. Peggy does not always wear a hat in her appearances, and the blazer and eagle details are the identifiers. The alternative complete costume set includes a hat if you want it. If you are building from individual items, skip it.

She co-founded S.H.I.E.L.D. alongside Howard Stark and Chester Phillips and later served as the agency’s Director — not a small footnote when you consider how much of the MCU runs through that organization. Her great-niece Sharon Carter also went on to work for S.H.I.E.L.D. decades later. In terms of screen appearances, Peggy is the most frequently recurring secondary character across the franchise.

They met during Project Rebirth in 1943 and never got their promised dance. Rogers crashed the Valkyrie into the North Atlantic in 1945 to prevent civilian casualties. Peggy moved on, married someone else, and had two children. When Rogers was recovered from cryogenic suspension decades later, Peggy had Alzheimer’s and sometimes forgot, mid-visit, that the reunion had already happened. It is one of the quieter tragic threads in the MCU and it does not get talked about enough.

What organization did Peggy Carter co-found alongside Howard Stark and Chester Phillips?

What is the name of Peggy Carter’s great-niece, who also became a S.H.I.E.L.D. agent?

Which actress was originally offered the role of Peggy Carter before Hayley Atwell was cast?