Dianna Agron (Getty Images)
Dianna Agron's loose bun is the perfect 'do to try for an evening out on the town. The goal is to create a style that's soft, pretty and most importantly, imperfect. Loosening up the look of a traditional tight bun makes it more versatile. A little chaos equals less formality.
The supplies you'll need are: a natural bristle brush or rat tail comb, a medium-hold (or possibly a maximum hold)
hairspray, a hair elastic and a handful of bobby pins or u-shaped hair pins. Curling irons are optional. Also, if you have bangs you may want to use a hair clip to get face-framing strands out of the way.
To begin, backcomb thoroughly through the crown if you want lots of volume or if your hair is very fine or sleek. If you'd like your 'do to be less voluminous, keep the backcombing to a minimum. Also, spritz some individual strands with hairspray to help define them. These pieces could also be curled to add more body.
Adding a few bends or waves sometimes helps the bun-making process easier. However, if you'd like straight springs to pop out here and there, it's okay to leave tresses alone.
Once the desired amount of texture has been created, loosely pull the hair back into a ponytail at the nape of the neck and curl one or two-inch sections.
The next step is to loosely twist the hair and wrap it around the base of the ponytail. Hold the newly created bun in place and insert the bobby pins around the perimeter. If the ends of any layers have escaped, simply loop and pin.
If bangs have been sectioned out, unclip them and style as usual. If long enough, they could be pinned or pushed behind the ears. The finishing touch is a generous blast of hairspray. Depending on hair texture, you might need minimum or maximum hold.
We've spotted other celebrities with a similar look, including Taylor Swift, Blake Lively and Emma Stone. Check out all the pictures in the Loose Bun Lookbook.
See Dianna Agron's Hair lookbook: