Nicole Kidman’s curls in The Undoing became an instant sensation, with many fans admiring her effortlessly glamorous, voluminous waves. Her signature perfect curly hair look in the show exudes elegance, sophistication, and natural beauty, making it a style worth recreating. The good news is that achieving this look at home is completely doable. With the right hair care routine, curling techniques, and finishing touches, you can transform your hair into soft, defined, and voluminous curls that resemble Nicole Kidman’s iconic hairstyle. Whether your hair is naturally straight, wavy, or curly, following these five steps will help you achieve perfect curly hair that lasts all day.

Why Nicole Kidman’s Curls in The Undoing Are So Popular

Nicole Kidman has naturally curly hair, but her curls in The Undoing were styled to perfection—giving off an effortlessly chic yet slightly undone vibe. These curls are soft, voluminous, and naturally flowing, making them ideal for both casual and formal occasions. Unlike overly structured curls, this look focuses on creating movement and bounce, making the hair appear full and healthy. The key to achieving perfect curly hair like Nicole Kidman’s is using the right styling products, heat techniques, and methods that keep your curls intact while maintaining their soft, effortless appearance.

Step 1: Preparing Your Hair for Long-Lasting Curls

Great curls start with proper preparation. The way you wash, condition, and prep your hair plays a major role in how well your curls form and stay in place.

Use a Sulfate-Free Shampoo and Conditioner

A crucial step in achieving perfect curly hair is maintaining proper moisture levels. Using a moisturizing, sulfate-free shampoo and conditioner keeps your hair hydrated while reducing frizz. Sulfates can strip natural oils from your hair, leaving it dry and prone to frizz, which is why it’s best to opt for curl-friendly products that enhance definition and shine. If you have fine or straight hair, avoid heavy conditioners that can weigh curls down. Instead, use a lightweight, volumizing conditioner that provides moisture without making your hair greasy.

Apply a Heat Protectant and Curl-Enhancing Products

Before using any hot tools, it’s essential to apply a heat protectant spray to shield your hair from damage. Heat styling can weaken your hair over time, leading to dryness and split ends, which is why a protective product is a must. Additionally, applying a curl-enhancing mousse or styling cream to damp hair can help add texture and hold to your curls. If you have naturally wavy or curly hair, using a curl-defining cream can enhance your natural texture and reduce frizz.

Step 2: Drying Your Hair for Maximum Volume and Curl Retention

How you dry your hair impacts how well your curls hold their shape.

Air-Drying vs. Blow-Drying

For those with natural waves or curls, air-drying is the best way to enhance the curl pattern while minimizing heat exposure. However, if you want more volume and definition, using a blow dryer with a diffuser attachment is a great option. A diffuser helps distribute heat evenly, preventing frizz and encouraging the natural curl pattern. If you have straight hair, rough-dry your hair using your hands instead of a brush to maintain texture before curling.

Boosting Volume with a Root Lifter

For added volume, apply a root-lifting spray or mousse before drying your hair. This creates more body at the roots, which helps the curls appear more voluminous and long-lasting.

Step 3: Curling Your Hair Like a Pro

Now comes the most important part—creating those beautiful, bouncy curls.

Choosing the Right Curling Iron

For Nicole Kidman’s The Undoing curls, a 1-inch or 1.25-inch curling iron is ideal. A larger barrel creates loose, effortless waves rather than tight ringlets. To achieve perfect curly hair, use a ceramic or tourmaline curling iron, which helps reduce heat damage and maintains a smooth, frizz-free finish.

Curl in Small Sections for Natural-Looking Curls

Divide your hair into sections and start curling from the bottom layers. Hold the curling iron vertically and wrap each section around it, leaving the ends slightly out for a more relaxed look. To achieve a more natural effect, curl some sections toward your face and others away from your face. If your hair struggles to hold a curl, use hair clips to pin curls in place while they cool. This locks in the curl shape and increases longevity.

Step 4: Locking in the Curls with the Right Styling Products

Use a Flexible-Hold Hairspray

A light mist of flexible-hold hairspray will keep your curls in place without making them stiff or crunchy. Hold the can about 10 inches away from your hair and lightly mist to ensure an even distribution.

Add Texture with a Dry Spray

To enhance volume and movement, use a dry texturizing spray at the roots and mid-lengths. This adds body without weighing the hair down, giving your curls an effortless, airy finish. Avoid heavy gels or wax-based products, as they can flatten your curls and make them appear greasy.

Step 5: Perfecting and Maintaining Your Curls

Finger-Comb for a More Natural Look

Once your curls have cooled, run your fingers through them to break up tight sections and create a more effortless, relaxed look. This step is crucial in achieving perfect curly hair that looks natural rather than overly styled.

Flip Your Hair for Extra Volume

For that signature bouncy effect, flip your hair upside down and gently shake it out to add volume and movement. If you want more definition, apply a small amount of hair oil or serum to the ends to add shine and reduce frizz.

Bonus Tips for Keeping Your Curls Intact

Now that you’ve styled your hair, here’s how to maintain your perfect curly hair look:

✨ Sleep on a silk pillowcase – This reduces frizz and prevents curls from flattening overnight.
✨ Use the pineapple method – Gather your hair in a loose ponytail at the top of your head to keep curls defined while you sleep.
✨ Refresh curls with a curling wand – If curls start falling, touch up a few sections with your curling iron.
✨ Avoid over-brushing – Brushing out curls will break them apart and cause frizz. Instead, use your fingers or a wide-tooth comb to detangle.

Final Verdict: Achieve Perfect Curly Hair Like Nicole Kidman

Nicole Kidman’s curls in The Undoing showcase the beauty of soft, voluminous, and effortless waves. Whether you have naturally curly hair or rely on heat styling, following these five steps will help you recreate this stunning look. Achieving perfect curly hair is all about prepping your hair properly, using the right curling technique, and finishing with the best styling products. Whether you’re aiming for a red carpet-inspired look or an everyday chic style, these curls will leave you feeling confident and glamorous. Try this tutorial and embrace the beauty of curls that last all day!