Garner's no-fuss hairstyle is perfect for those on the go (you can get her tousled waves by loosely braiding slightly damp hair and sleeping on it). To get this look, take two sections of hair from both sides of your face and twist them out with your finger. Angle the twists towards the back of your head, and connect them with an elastic. Mist with hairspray to keep the look in place (try Herbal Essences Tousle Me Softly Hairspray, $2.99).

Messing's elegant French twist works best with medium to long hair. To get this look, create a loose ponytail at the nape of your neck, but don't secure it. Hold the ponytail with your hands and start twisting until you feel it tightening against your head. Point it upright and fold the end of your ponytail down. Tuck the ends down using your thumb and use bobby pins to hold the hair in place. You can add a hair accessory like Messing's to draw more attention to your red carpet worthy look.

Greene's criss-cross hairstyle might look complicated, but don't worry -- you'll be able to achieve it in under five minutes. Give yourself a side part and sweep your bangs to the side. Take one thin piece of hair and twist it, securing it to the back of your head with bobby pins once it's finished. Do the same with several more sections of hair -- and pin them on top of the previous strands, angling each in a slightly different direction. Once the multiple twists reach the back of your head, wrap the ends together with the rest of your hair into a bun.

Adding a twist to an otherwise simple messy ponytail kicks it up a notch. Gellar's hairstyle only takes an extra minute -- before gathering hair up into a ponytail, take a strand of hair near the top of your head and twist it loosely, adding a thin section of hair every time you twist. Once it reaches your ear, pin it back and tie your hair up into a messy ponytail. Leave out a few wisps of hair to add to the overall look.

Portman's classy one-sided twist works well for those with thick or curly hair. To get this look, take a large strand of hair from the front of your face and pull it towards the back of your head. Start twisting several inches away from your face and tuck the twist under the hair at the back of your head, under your crown, securing it with bobby pins. Finish the look by applying smoothing cream to tame frizzy fly-aways (try TIGI Bed Head After-Party Smoothing Cream, $14.99).