Last updated: May 17, 2026·🔄 Product links checked and unavailable products replaced with current alternatives for 2026.· By Serdar

Halloween Costume Guide

William Hale Halloween Costume Guide

Round Glasses  ·  Brown Fedora  ·  King of the Osage Hills

Nine pieces built around three essential details. The man Robert De Niro played in Scorsese’s 2023 film — calm, well-dressed, and very dangerous.

Killers of the Flower Moon Robert De Niro 1920s Action Glasses Gray Hair Hat Leather Real Person Suit Villain Western
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Quick Answer: The William Hale Halloween costume centers on three pieces that make the character readable.
  • Round metal frame glasses (essential)
  • Light brown fedora (essential)
  • Beige suit vest layered under brown jacket (essential)
  • Blue stripe Oxford shirt and plaid tie
  • Western cowboy boots
  • Short grey wig and leather trench coat

William Hale ran cattle and ran people in 1920s Osage County, Oklahoma. He called himself a friend to the Osage Nation while orchestrating the murders of its members for their oil headrights. In Martin Scorsese’s Killers of the Flower Moon (2023), Robert De Niro plays him as a man who is always composed, always well-dressed, and always the most dangerous person in the room. The costume is a layered 1920s Western suit: hat, glasses, vest under jacket, boots. People who saw the film will place it. Everyone else will see a period businessman, which is not far off.

Items Total9 Items
DifficultyMedium
Vibe1920s Oklahoma Power
Cost$80–$160

William Hale Halloween Costume Items

William Hale Killers of the Flower Moon Halloween costume infographic showing all nine items: round glasses, grey wig, brown fedora, Oxford shirt, plaid tie, beige vest, brown suit, cowboy boots, and leather trench coat

William Hale Costume Items

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William Hale Killers of the Flower Moon Robert De Niro 1920s
  • 1 Round Metal Frame EyewearThis is one of the three details that makes the character readable. Hale wears round wire-frame glasses throughout the film and they change the face immediately. Get round frames, not rectangular. The shape matters more than the color.
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  • 2 Short Grey WigDe Niro’s Hale has close-cropped grey hair, neat and deliberately presented. If your hair is already short and grey, skip this. Otherwise it is worth getting right since the hair color and cut are part of the composed, authoritative look the character projects.
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  • 3 Light Brown HatThe fedora is the second of the three essential pieces. Hale is almost never without it outdoors and it places the character immediately in 1920s Oklahoma ranch culture. Brown, not black. A black hat reads as generic Western villain; the brown is specific to this character and this film.
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  • 4 Blue Stripe Oxford ShirtThe base layer under the tie and vest. Hale dresses formally even in casual settings, which is part of what makes him unsettling. A striped Oxford reads as period-appropriate and intentional rather than just a plain white shirt.
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  • 5 Stripe Plaid Tie SetA patterned tie sits over the shirt and under the vest. Period-appropriate and adds texture to the layered look. The vest covers most of it anyway, so the tie only shows at the collar. Get a pattern that reads as 1920s: muted plaid or thin stripes.
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  • 6 Beige Suit VestThe third essential piece. The vest layered under the jacket is what separates this from a standard suit costume. It signals period formality and it is a Hale-specific detail. Get beige or tan, not black. The color contrast between the vest and the jacket is part of the character’s look.
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  • 7 Brown Dress SuitThe outer layer over the vest. Brown, not black or charcoal. The warm brown tones in Hale’s wardrobe ground the Oklahoma setting. If the suit comes as a full set, even better. The jacket and trousers should match.
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  • 8 Western Cowboy BootBoots over dress shoes. Hale is a rancher and a powerful man in rural Oklahoma, and the boots ground that identity. Brown leather, low to mid heel. These are the one detail at the bottom of the costume that tells you this is not a city character.
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  • 9 Leather Trench CoatOptional for indoor events but useful if you are going between venues in cold weather. Hale wears a heavy coat in outdoor scenes and it adds weight to the silhouette. Skip it if you are staying inside all night. The suit and vest read fine without it.
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William Hale from Killers of the Flower Moon seated in a vintage car wearing a brown fedora, round glasses, and tan jacket while gesturing to a man outside

How to Style the William Hale Halloween Costume

The hat and glasses are what people see first, and they have to work together. A brown fedora with round wire frames on top of a grey wig is a specific combination. Without the glasses, it’s a man in a hat. Without the hat, it’s a man in glasses. The vest under the jacket is the third piece, and if any of those three are off or absent, the costume reads as a generic period look with no character attached to it. Most people at the party won’t know the film. The ones who do will recognize it from across the room.

Hale is a man who controls a room without raising his voice. He smiles a lot and says things plainly and never seems bothered. At a party, this means you do not perform the character loudly. You stand in one place, you speak slowly when you speak, and if someone asks who you are, you say his name and pause. If they know the film, they will react. If they don’t, the pause still works. It is a comfortable character for a long night because it asks almost nothing of you physically and rewards patience over performance.

Keep the Wig Tight Under the Hat

Pin the wig at the front hairline before the hat goes on. The hat holds it down, but the moment it comes off for a photo, a loose wig shifts forward and sits wrong for the rest of the night. Two pins at the temples takes thirty seconds and prevents the problem entirely.

The Vest Button Order

Button the vest fully before putting the jacket on. If you button the jacket first and then try to close the vest, the vest bunches under the jacket and ruins the layered silhouette. Vest buttoned, jacket open, check the fit, then close the jacket. It looks like a minor detail until you’re in a photo and the vest is puckering.

William Hale Group Halloween Costume Ideas

The Osage Nation Conspirators

William Hale, Mollie Burkhart, Ernest Burkhart, Tom White

This is the strongest option for people who have actually seen the film. The four characters cover the full story: the conspirators, the victim at the center of it, and the FBI investigator who built the case. The costumes vary enough that you don’t all look the same. Anyone who has seen the film will understand immediately. Anyone who hasn’t needs a sentence of explanation, which is fine.

William Hale Mollie Burkhart Ernest Burkhart Tom White

Corrupt Patriarchs and Crime Bosses

William Hale, Vito Corleone, Thomas Shelby, Tony Soprano

Every person in this group is recognizable without context, which makes it conditional only on the Hale slot. The other three are widely known and the theme lands immediately. Hale is the least famous of the four, but the group concept explains itself and the visual contrast between 1920s Oklahoma and 1970s New York is good. Works best if the Hale slot commits fully to the period look.

William Hale Vito Corleone Thomas Shelby Tony Soprano

The De Niro Portrayals

Travis Bickle, Vito Corleone, Jimmy Conway, Jack Byrnes

This is a film-person group. Travis Bickle and Vito Corleone are universally known. Jimmy Conway from Goodfellas lands for anyone who has seen the film. Jack Byrnes from Meet the Parents is genuinely funny in this company and easier to build than the others. The concept works if everyone commits. Half-committed De Niro costumes read as just a group of men in different suits.

Travis Bickle Vito Corleone Jimmy Conway Jack Byrnes

The Williams

William Hale, William Wallace, Billy Butcher, Will Byers, Will Smith

The theme is loose and only works if everyone in the group understands that the joke is the name, not a shared world. Will Smith as Fresh Prince and Will Byers from Stranger Things are widely recognized. William Wallace and Billy Butcher are solid. Hale is the one that requires the most explanation, but in this group the confusion is part of the bit.

William Hale William Wallace Billy Butcher Will Byers Will Smith

Historical True Crime Masterminds

William Hale, Jeffrey Dahmer, Joe Exotic, Jordan Belfort

This is a niche group and you should know the room before committing. Joe Exotic and Jordan Belfort are broadly recognizable. Dahmer lands but carries weight depending on the crowd. Hale is the most obscure of the four and the most historically serious. All four are real people who committed real crimes. That is the concept, and it either works for your group or it doesn’t.

William Hale Jeffrey Dahmer Joe Exotic Jordan Belfort
William Hale cosplay from Killers of the Flower Moon showing the character in a dark suit, round glasses, and patterned tie with a stern expression in a formal interior setting

William Hale Halloween Costume DIY Tips

What You Need to Source vs. What You May Already Own

This costume has nine pieces but only a few you need to specifically hunt down. The suit and boots are the biggest purchases. The smaller items are inexpensive. Check your closet before buying the shirt and tie.

  • Round glasses: buy them, the shape is specific and most people do not own a pair
  • Brown fedora: buy it, this is non-negotiable for the character
  • Beige vest: buy it, this is the detail that separates the costume from a generic suit
  • Brown suit: buy or rent, the color matters, a dark charcoal suit is the wrong read
  • Blue stripe Oxford shirt: check your closet first, a striped dress shirt is a common item
  • Plaid tie: a few dollars, buy it
  • Western boots: buy if you don’t own a pair, they also get worn again
  • Short grey wig: buy if your hair is not already short and grey
  • Leather trench coat: skip it for an indoor event, save that money

Playing Hale at a Party

Hale never raises his voice and never rushes. He is a man who has decided the outcome of every conversation before it begins. That is an easy character to play because it requires stillness, not performance. Find a good spot in the room and stay near it.

  • Speak quietly. Not a whisper, just quieter than whoever you’re talking to. People lean in.
  • His most famous line from the film is “I love the Osage.” Delivered with a calm smile, it lands immediately for anyone who has seen it.
  • Do not explain the character to everyone who asks. Say the name and the film once. If they know it, great. If not, move on.
  • Smile more than you think you should. Hale is not a brooding villain. He is friendly. That is what makes him unsettling in the film and it works at a party too.
  • If someone asks what you are, answering “the most powerful man in Osage County” without further explanation is a complete sentence. Let them figure out the rest.

William Hale Halloween Costume: FAQ

Nine pieces: round metal frame glasses, a short grey wig, a light brown fedora, a blue stripe Oxford shirt, a plaid tie, a beige suit vest, a brown dress suit, Western cowboy boots, and an optional leather trench coat. The glasses, hat, and vest worn together are the three pieces that make the character readable. Without all three, the costume reads as period clothing with no specific character attached.

His most remembered line in the film is simple and devastating: “I love the Osage.” It is the line that defines the character because he says it with complete sincerity while doing the opposite. Deliver it once, to the right person, with a calm smile, and anyone who has seen Killers of the Flower Moon will react.

Recognition depends heavily on your crowd. The film came out in late 2023, won serious awards attention, and is on Apple TV+, so film-literate adults will place it. General party crowds are less consistent, and without the film context, the costume reads as a period businessman. Go in knowing that and you will be fine.

The suit helps but it is not the first thing people read. The glasses, hat, and vest do the recognition work. If budget is tight, a vest over a dress shirt and dark trousers covers the essential silhouette. Skip the suit before you skip the hat.

William Hale is the central antagonist of Martin Scorsese’s Killers of the Flower Moon (2023), played by Robert De Niro. The film covers the real Osage Indian murders in 1920s Oklahoma and the early FBI investigation led by Tom White. It is based on David Grann’s nonfiction book of the same name.

Ernest Burkhart is the obvious pair since the two characters drive the film’s story together. Mollie Burkhart works well for a three-person group. All three together gives you the full moral weight of the film in one photo, which lands hard if the people around you know the source material.

It is a costume of a real historical criminal from a serious film about real events, which is true of many widely-worn costumes. If you wear it, know the history. Wearing it without any knowledge of what Hale actually did is the version of this that sits wrong. Wearing it because you engaged with the film and its subject is different.