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The best Halloween costumes for girls have to pass the twirl test: a skirt that spins on the doorstep, room for a warm layer underneath, and nothing that gives up halfway down the street. Our top pick for 2026 is the kids' rainbow star witch costume, a four-piece set with a star-print dress, stripey tights, hat and wand, checked like every design we sell across 30+ measurements before it ships. Below it we have ranked seven more picks from our own kids' range, guided by the thing our search data keeps telling us: a huge share of girls' costume searches are for scary looks, not sweet ones.
Table of Contents
- What do girls actually want this Halloween?
- Which classic girls' costumes never miss?
- Can a princess dress work for Halloween?
- What if she wants scary, not sweet?
- Which costumes keep her warm and moving?
- Frequently asked questions
What do girls actually want this Halloween?
Not a pink version of her brother's costume, for a start. This is the girls' cut of our guide to the best kids' Halloween costumes, and we built it on two tests the boys' list never gets asked to sit: can she twirl in it, and does the skirt still behave three streets in? More than half of Britons planned to spend on Halloween in 2025, averaging £26 a head according to YouGov's Halloween spending research, and £26 buys a lot of regret if the fancy dress in the photo turns out to be see-through fabric with a zip that gives up before the night does.
Every pick below is a real costume from our own range, with what is in the pack spelled out so there is no improvising at 5pm on 31 October. Shopping for her brother at the same time? The best Halloween costumes for boys get their own ranking, built on different tests entirely.
Which classic girls' costumes never miss?
1. Kids Rainbow Star Witch Costume
The witch is the girls' Halloween costume that never goes out of date, and the kids' rainbow star witch costume is our proof that not every witch has to be a bad witch. One box holds the full character: a star-print dress, stripey tights, a matching hat and a wand, so nothing needs improvising on the night. The skirt is the point here; it is cut to spin, and it will be spun. Top of our list because it is the one that gets worn again in November, and December, and at some point in March.
2. Kids Black Cat Costume
The kids' black cat costume is the quiet all-rounder of girls' fancy dress: a soft black jumpsuit with faux-fur details, an attached tail and a headband with cat ears. A jumpsuit is a gift on a cold October night, because her arms and legs are covered without a single extra layer to argue about, and there is nothing to snag mid-run. Black cats have kept witches company for centuries, which is why this one earns its Halloween stripes, and the same suit walks straight into World Book Day in March without alteration.
3. Kids Dark Vampiress Costume
"What is the best vampiress costume for girls?" is one of the most-asked girls' costume questions we track, and the kids' dark vampiress costume in red is our answer. It is classic scary with proper theatre to it: a floor-length black gown with a deep red front panel and a dramatic stand-up collar, readable as vampire from the far end of the street, no face paint required (though a set of plastic fangs never hurt anyone, technically). We cannot promise she will be able to hypnotise her friends or turn into a bat, and we ask you to make that clear to her before the night.
Can a princess dress work for Halloween?
4. Dark Princess Gothic Witch Costume
Yes, if the princess has been through some things. The girls' dark princess gothic witch costume is the fairytale gown gone to the dark side: a long black dress with fairest-of-them-all drama and none of the pastel. It is our pick for the girl who lived in princess dresses at five and now, at nine, would like everyone to know she is over it. She still gets the sweeping gown and the twirl; the street gets a small gothic monarch surveying her subjects. Fairy-tale costume searches carry real volume in our data every autumn, and this gown is the version that belongs to Halloween.
What if she wants scary, not sweet?
Then she is in the majority, and we have the receipts: in our own store search data from last Halloween, the biggest single girls' costume theme was the scary clown, and searches for scary girls' costumes outnumbered almost everything sweet. The two picks below are the ones that answer that demand properly, with real pack contents rather than a mask and a promise.
5. Kids Creepy Clown Girl Costume
The scary clown is the most requested girls' Halloween look in our search data, and the kids' creepy clown girl costume is a haunted-circus design of our own: a detailed ruffle skirt dress with gloves and legwarmers in the pack. The ruffles do the twirl work, the legwarmers quietly do the warmth work, and the whole thing unsettles adults at exactly the rate she is hoping for. No film clown required; this one comes from our own big top, and we are not entirely sure we would visit it after dark.
6. Kids Zombie School Girl Costume
The kids' zombie school girl costume is tattered school uniform with just the right amount of undead, and the joke lands the second a door opens: every parent on the street has seen that uniform before, minus the decay. It is one of the girls' looks UK parents search for most in October, and it needs nothing but the costume and a bit of face paint to finish. School uniform she is excited to put on; we admit we did not see that coming either.
Which costumes keep her warm and moving?
Here is the honest test of a girls' Halloween costume: 31 October is cold, dark and mostly spent outdoors, and a costume that cannot take a coat or a base layer will be abandoned by the third house. RoSPA's Halloween guidance recommends wearing clothes under fancy dress anyway, as a layer of protection between costume and skin, so a design with room to layer is safer and warmer at the same time. The two picks below are built for exactly that job.
7. Kids Electric Skeleton Jumpsuit Costume
The kids' electric skeleton jumpsuit costume is a printed stretch jumpsuit in 125GSM+ breathable fabric: white bones lit up with electric-blue streaks, covering her neck to ankle. Full coverage is the warmth strategy, stretch fabric is the movement strategy, and the electric print does the glow-look work with zero make-up. Skeletons are also the great equaliser of kids' fancy dress; if the whole family is going skeletal, our ranking of the best skeleton costumes for kids covers every variant.
8. Kids Pumpkin Tabard Costume
For toddlers and the youngest trick-or-treaters, the kids' pumpkin tabard costume is the easiest win on this list. The bright orange tabard goes straight over a winter coat or a jumper, is on in roughly four seconds, and comes off just as fast when the party gets warm. It is the layering advice made into a costume, and the pumpkin face does all the character work with zero make-up. If this is her first Halloween on the doorsteps, start here.
One more thing on the twirl test, because we take it seriously: dresses and skirts in this list are cut with room to move, not just room to stand in the photo, and we check every design across 30+ measurements and run more than 500,000 quality checks a year to keep it that way. A girls' costume that only works standing still is a boys' costume with a skirt drawn on, and we do not sell those.
Frequently asked questions
What are the best Halloween costumes for girls?
Our top girls' picks for 2026 are the rainbow star witch, the black cat jumpsuit, the dark vampiress, the dark princess gothic witch, the creepy clown girl, the zombie school girl, the electric skeleton jumpsuit and, for toddlers, the pumpkin tabard. The best choice is the one that matches her scare level and passes the twirl test: room to move, layer and run.
What are the best scary Halloween costumes for girls?
The creepy clown girl and the zombie school girl are our two strongest scary picks, and scary is what girls increasingly ask for: in our own search data the scary clown was the single biggest girls' costume theme last Halloween. The dark princess gothic witch is the step between sweet and scary if she wants drama without gore.
What age do girls' Halloween costumes fit?
Most of our girls' costumes come in age-banded kids' sizes, checked across 30+ measurements per design, so buy by her age band and size up if she is between bands or wants layers underneath. The pumpkin tabard is the toddler pick; the other picks on this list run through the primary school years.
How do you keep a girls' costume warm for trick-or-treating?
Layer clothes underneath rather than adding a coat on top: RoSPA recommends a layer under fancy dress as protection between costume and skin, and it doubles as insulation. Jumpsuit-style costumes like the black cat and the electric skeleton cover arms and legs by design, and a tabard goes straight over a winter coat.
Can a Halloween costume double as a World Book Day costume?
Yes, if you pick a character that lives in books as well as on doorsteps. The black cat, the witch and the dark princess all reappear happily for World Book Day in March, which turns one costume into two school events and a dressing-up box staple. Buy once in October, twirl twice a year.
One practical note to end on: the popular girls' sizes are the first to disappear in October, so decide while her age band is still on the shelf. What is in the photo is what is in the pack, on every costume we sell. The full girls' and boys' range lives in our kids' Halloween costumes hub, all of it backed by the Morph Promise: no costume fails, designs that flatter, party-long comfort, no unwanted surprises. We make your best times better.
