Maudie Miller Costume From The InBESTigators

Maudie Miller Halloween Costume Items

Maudie Miller from The InBESTigators Halloween costume infographic showing denim overall, trench coat, varsity jacket, overall dress, plaid shirt, dress shirt, leggings, polo shirt, watch, and chelsea boots

Maudie Miller Costume Items

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Maudie Miller The InBESTigators Kids Detective

1 Denim Overall SkirtA simple layering piece over the shirt. It reads as school-casual without needing any explanation, and it is easy to size up or down since it is not the item doing the identification work.
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2 Hooded Trench CoatUseful if the event is outdoors or cold. Khaki reads as neutral school-wear rather than costume-y, which is the point here.
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3 Varsity JacketAdds bulk for a cold night out. Not something Maudie wears on screen, so treat it as optional layering rather than a reference piece.
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4 Corduroy Overall DressAn alternate base layer if you’d rather skip the skirt-and-shirt combo. Some reviewers note the buttons loosen with wear, so check them before you head out.
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5 Plaid Button-Down ShirtWorks underneath the overall or trench coat. Long sleeves keep it from looking bare if the jacket comes off.
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6 Dress ShirtA plain white option if plaid isn’t available. Check your closet first, since a basic white button-down is one most kids already own.
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7 LeggingsMatches how Maudie is described in the show, boots and leggings under her uniform rather than bare legs or tights.
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8 School Polo Shirt (essential)The closest match to Maudie’s actual uniform top, a light blue polo in the show. White works fine too. This is the piece that ties the whole outfit back to a specific school kid instead of a generic look.
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9 Digital WatchA small, practical detail. Not a defining piece, so any simple digital watch you have on hand will do.
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10 Chelsea Boots (essential)This is the costume. The show specifically calls out that Maudie wears boots instead of the school-issued shoes, and it’s the detail every write-up about her appearance leads with. Skip this and you’re just a kid in a school uniform.
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How to Style the Maudie Miller Costume

The boots get noticed first, and they need to look like actual boots, not sneakers or school flats with a costume tag on them. If they’re missing, the rest of the outfit reads as a kid in a plain school uniform instead of a specific character. At a party, the risk is the opposite problem: too much extra layering. Skip the varsity jacket and trench coat if you’re indoors, since Maudie’s actual look is plain and a little undone, not styled.

She walks into a room, states the answer to whatever went wrong that day, and keeps moving. No dramatic reveal, no pause for effect. If you want to play the part at a party, that flat delivery is the whole bit. Announce something obvious the same way you’d announce a crime solved.

Keep the notebook prop small and specific

A plain, worn-looking notebook works better than a decorated one. Maudie’s notebook matters to her because of what’s inside it, not how it looks on the outside, so an overly crafted prop actually undersells the reference. A small spiral pad you can flip open one-handed is closer to the mark.

Don’t fix her hair

Short and a little messy is correct. If you’re using a wig or a clip-in fringe, resist the urge to style it neatly, since the show makes a point of Maudie not caring about her appearance. A too-polished version of “messy short hair” reads as a different, more put-together character.

Maudie Miller Group Halloween Costume Ideas

Squad Idea

The InBESTigators (Maudie, Ezra, Ava & Kyle)

Excellent as a full group, since the four of them are always shown together and each has a distinct enough look that the set reads instantly to anyone who has seen the show. Maudie in boots, Ezra with his notebook and theories, Ava as the organized one, and Kyle as the distracted one who somehow still helps solve the case. You need all four for it to click, though. Three of the four just reads as kids in school clothes.

Maudie Miller Ezra Banks Ava Andrikides Kyle Klimson

Duo Idea

Maudie Miller & Ezra Banks

Strong if the crowd actually knows the show, since Ezra and Maudie are the two the plot centers on and their dynamic, him unsure, her completely certain, is the engine of most episodes. Without that context, it just reads as two kids in school uniforms, one with a notebook. Works best at a school event or a party where other people already know the source material.

Maudie Miller Ezra Banks

Family Idea

Maudie Miller & Brian Miller

Might work, but this one only makes sense to people who watched closely enough to know Maudie’s dad by name. He’s a background character, a neurosurgeon who tells bad jokes, so the pairing has no strong visual hook on its own. A parent-and-kid duo at a family event where the reference doesn’t need to land with strangers is really the only place this works.

Maudie Miller Brian Miller

Maudie Miller from The InBESTigators in her school uniform and boots, a build for group and solo Halloween costumes

Maudie Miller Halloween Costume DIY Tips

Building the Look

Most of this is stuff already sitting in a kid’s closet. The boots are the one item worth actually buying if you don’t already have a pair, since nothing else on this list carries the costume without them.

School polo: check the closet first, most kids have a plain polo already.
Plaid or dress shirt: either works, whichever is already on hand.
Denim overall or overall dress: pick one, not both. Layering both is too warm and too bulky.
Leggings: any solid pair under the skirt or dress.
Chelsea boots: buy these if you don’t own a pair. This is the item that makes the costume.
Trench coat or varsity jacket: optional. Only add one if it’s cold where you’re going.
Digital watch: skip it if you don’t have one. Nobody will notice it’s missing.
Notebook prop: grab a plain spiral pad. Write “Case Notes” on the cover if you want, but don’t decorate it.

Playing Maudie at the Party

Maudie doesn’t perform. She observes, states a conclusion, and moves on to the next thing. That’s a much easier character to play at a party than it sounds, because it just means saying less.

When something goes wrong: pull out the notebook, look at it for a second, then say “this is what happened” before explaining the obvious.
Don’t react to compliments on the costume. Maudie genuinely doesn’t think about how she looks, so playing it straight is more accurate than playing it up.
If someone asks who you are: answer factually, like you’re reading it off a case file, not introducing yourself.
The notebook gives you something to hold and glance at during a loud party, which is more useful than it sounds when you don’t know what to do with your hands.

Maudie Miller Halloween Costume: FAQ

How do I dress like Maudie Miller for Halloween 2026?

Start with a school-style layer, denim overall or the trench coat over a plaid or dress shirt, then add leggings. The polo shirt is the closest match to her actual show uniform. Finish with the boots, since that is the one detail the show itself calls out as hers.

Is the Maudie Miller costume still a good choice for Halloween 2026?

Niche. The InBESTigators only ran two seasons on Netflix and ABC Me back in 2019 and 2020, so most adults will not place her on sight. Kids who grew up on the show, especially younger ones who found it on Netflix well after it aired, are the ones who will recognize her immediately.

What are Maudie Miller’s most famous quotes?

Her catchphrase is a flat, matter-of-fact “This is what happened,” delivered right before she lays out the solution to a case. She is also on record saying “I never saw Kyle acting too silly,” a line from The Case of the Unhappy Camper that sums up how she reads her friends.

Who plays Maudie Miller in The InBESTigators?

Maudie is played by Anna Cooke. She has said in interviews that she had to cut her hair short for the role after seeing an audition notice in her school newsletter (Maudie Miller Wiki).

What show is Maudie Miller from and is it still on Netflix?

She is the lead of The InBESTigators, an Australian mystery comedy that aired on ABC Me from June to November 2019, with Netflix releasing both seasons internationally in 2019 and 2020 (The Inbestigators). It has stayed available on Netflix in most regions since.

Why does Maudie Miller wear boots with her school uniform?

It is a character choice built into the show. Maudie wears boots instead of the regulation school shoes and keeps her hair short instead of the standard ponytail, because she genuinely does not think about how she looks. It is the detail that makes her read as her rather than a generic school kid.

Maudie Miller Halloween Costume Guide