Think half-up, half down 'dos and a dodgy bridesmaid look or the style you used at school to eek another day out of your unwashed locks will probably come to mind - but it's got a new lease of life this season. All hail the 'hun', ie. the half bun.
So, it's not exactly a new look - Sienna Miller owned this style while off-duty back when she had long locks, but now it's reached the red carpet, too. Everyone from Kate Middleton, to Diane Kruger, to Margot Robbie and Kate Mara have sported the look this summer and it's taking over Instagram thanks to its catchy new moniker.
It's perfect for giving second or third day hair a new lease of life. NB. Poppy Delevingne and Amber Le Bon working the look during fashion week [above].
The oh-so boho look is also ideal for when you can't take the heat of having a full head of hair hanging around your shoulders and face. Take that Swinter!
Here's our golden rules on how to rock the hun hairstyle:
1. The 'hun' is easiest to achieve when hair isn't freshly washed and slippery - a little natural oil will help it stay put.
2. To create the look - start by pulling the hair back as if creating a ponytail from about an inch above the ears, leaving most of your lengths free.
3. Fasten with a hair elastic however far above the crown feels comfortable. A high bun works better by night, while by day it's all about a looser low style.
4. Twist your pony from the elastic to the end then wrap hair tightly around the base.
5. Use a few kirby grips to pin in place. Then tease a little looser with your fingers to make the over-all effect more relaxed.
6. The 'hun' is best worn with slightly tousled locks, so be sure to work a little salt or texturising spray through the lengths once complete. We like SachaJuan's Ocean Mist Texturising Spray, £18 and Bumble & Bumble's City Swept Finishing Spray, £22.
Et voilà - hey hun!
Need some hun-spiration? Scroll through the gallery below to see how the stars are wearing it...
celebrities wearing the hun hairstyle
1 of 8rexfeatures_5088025bz
When a hairstyle reaches the front row, you know it's got legs. Poppy Delevinge wore her platinum locks in a full-bodied, high topknot for a dressy take on the hun at Michael Kors New York Fashion Week show. [Rex]
2 of 8rexfeatures_5088149h
Also attending Michael Kors NYFW show, Amber Le Bon wore her hun with tumbling waves for a boho effect. [Rex]
3 of 8rexfeatures_4914422f
Vanessa Hudgens did the hun off-duty in a high, messy topknot. We'll be stealing her style for our next down day. [Rex]
4 of 8rexfeatures_3677247v
Kate Mara gave her red carpet look a noncholant finish with this loose take on the hun, with her lengths in surfer girl waves. [Rex]
5 of 8GettyImages-462115762
Margot Robbie flew the flag for doing the hun with short hair at Sundance Film Festival 2015. [Getty]
6 of 8rexfeatures_5225031n
Chiara Ferragni rounded off Paris Fashion Week with a messy take on the hun. Perfect off-duty hair inspo. [Rex]
7 of 8rexfeatures_5358913dw
Kendall Jenner proved the hun can look seriously glam and glossy with this high-slung version, paired with tumbling waves and a plunging green gown. [Rex]
8 of 8rexfeatures_5387056bn
Diane Kruger's effortlessly undone style is a perfect take on the half-up 'do for a night out. [Rex]