What kind of coat does the killer wear in I Know What You Did Last Summer?

He wears a long, heavy black fisherman's rain slicker, often referred to as a sou'wester coat, which has a shiny, waterproof finish.

How do you make the hook prop safe for parties?

Use a hollow plastic or foam costume hook. Avoid metal or sharp plastic props to ensure you don't accidentally scratch anyone in crowds.

Is the Fisherman's coat black or blue?

In the film, the coat is a very dark black, though under certain blue-toned night lighting it can sometimes appear dark navy blue. Black is the standard and most accurate choice.

AI-generated example

I Know What You Did Last Summer Costume

Recreate the iconic 90s slasher villain with a dark fisherman aesthetic.

The Fisherman (Ben Willis) from the 1997 slasher classic 'I Know What You Did Last Summer' is one of horror's most recognizable figures. Perfect for fans of 90s cinema, this costume is highly atmospheric, instantly recognizable, and surprisingly easy to put together. The look centers around a heavy black rain slicker, a fisherman's hat, and a menacing metal hand hook.

Difficulty: Easy
Time: ~15 min
Budget: $45–120

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I Know What You Did Last Summer costume — Example look · AI-generated

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What you need for a I Know What You Did Last Summer costume

Short on time? Buy it ready-made

Spirit Halloween sells the complete I Know What You Did Last Summer costume — one box instead of 5 pieces.

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Black Fisherman Slicker Coat
A long, heavy-duty black rain jacket or trench coat, preferably with a glossy or rubberized finish to mimic wet weather gear.
DIY: Use a long black trench coat and spray it with a light coat of clear gloss fabric sealer for a wet look.
Amazon
Black Sou'wester Fisherman Hat
A matching black waterproof fisherman's hat with a wide downward-sloping brim.
Amazon
Silver Costume Hand Hook
A realistic-looking silver pirate or industrial hook prop that fits over your hand.
DIY: Shape a wire hanger into a hook, wrap it in foil, and attach it to a painted black plastic cup handle.
Amazon
Black Leather Gloves
Simple black leather or faux-leather gloves to cover your hands under the hook.
DIY: Use plain black winter gloves.
Amazon
Black Rubber Rain Boots
Heavy-duty black rubber boots or work boots to complete the maritime look.
DIY: Any chunky black boots will work.
Amazon

Rather not assemble it? See ready-made I Know What You Did Last Summer costumes at Spirit Halloween ↗

How to put it together

1
Put on dark pants and a dark shirt as your base layer.
2
Pull on the black rubber rain boots, tucking your pants inside them.
3
Put on the long black slicker coat and button or zip it up completely.
4
Put on the black gloves to conceal your hands.
5
Place the costume hook prop over your dominant hand, securing it under the sleeve cuff.
6
Put on the black fisherman's hat, pulling the brim down slightly to shadow your face.

Makeup & hair

Keep hair completely hidden under the hat. For makeup, apply dark grey or black eyeshadow around the eyes to create a sunken, shadowed, and menacing look beneath the hat's brim.

I Know What You Did Last Summer for couples, groups, kids & more

couples: Pair up with one of the teens from the movie, like Julie James in a 90s-style tank top and jeans, carrying a letter that reads 'I Know What You Did Last Summer'.
group: Have one person dress as the Fisherman while others dress as 90s teens (Julie, Helen, Barry, and Ray) in classic late-90s casual wear.
kids: A miniature version using a yellow or black kids' raincoat, rain boots, and a soft foam hook prop.
Plus size: A long, loose-fitting black rain poncho or oversized duster coat works perfectly for this silhouette.
pet: A small dog wearing a yellow or black pet raincoat and a tiny matching sou'wester hat.

Tips

Use a spray bottle filled with water to mist your coat right before photos for an authentic, fresh-out-of-the-water look.
The wide brim of the hat naturally blocks light, so tilt your head down slightly in photos to cast dramatic shadows over your eyes.
Ensure your hook prop is made of lightweight plastic or foam so it is comfortable to carry around all night.
This costume is naturally windproof and waterproof, making it excellent for cold or rainy outdoor Halloween events.

I Know What You Did Last Summer costume FAQ

What kind of coat does the killer wear in I Know What You Did Last Summer?: He wears a long, heavy black fisherman's rain slicker, often referred to as a sou'wester coat, which has a shiny, waterproof finish.
How do you make the hook prop safe for parties?: Use a hollow plastic or foam costume hook. Avoid metal or sharp plastic props to ensure you don't accidentally scratch anyone in crowds.
Is the Fisherman's coat black or blue?: In the film, the coat is a very dark black, though under certain blue-toned night lighting it can sometimes appear dark navy blue. Black is the standard and most accurate choice.

Did you know? The iconic look of the Fisherman was inspired by real-world maritime gear combined with classic urban legends of 'The Hook,' updating the classic hook-handed killer trope for the 1990s teen scream generation.