One of Nicole Kidman's biggest hair regrets is messing with her natural curl pattern. People have been asking if Kidman wore a wig on her recently concluded HBO television series, "The Undoing" but there hasn't been any confirmation on that bit yet. However, 1992's "Far and Away," one of Kidman's earliest movies, shows her strawberry blonde ringlets in all its curly glory. After many hair evolutions over her long Hollywood career, Kidman has been showing off her natural curls on her Instagram page and it makes her look younger than ever. 

Below are some of her favorite hair care products and styling tips.

Hair Oil

Kidman likes using Philip B Rejuvenating Oil as an overnight treatment, especially before big events. Celebrity hair stylist Philip Berkovitz confirms to W Magazine that Kidman uses his hair oil for red carpet appearances and after long days of shooting. Kidman adds that when she's not working, she leaves her hair au naturel and saturates it with nourishing oils. Another favorite is In Fiore Calendula Solution Botanique.

Also read: The Best Hair Oils to Use in the Winter For Every Type of Hair

Leave hair to air-dry

For her naturally curly hair, Kidman prefers air-drying and admits to Harper's Bazaar that she's very low-maintenance and doesn't like long salon treatments. To keep her hair fizz-free, she uses Kérastase Discipline Oléo-Curl leave-in cream and Moroccanoil Hydrating Styling Cream. For curly and coily hair textures, Cosmopolitan also recommends these pocket-friendly options: Waterless Curl Milk Refresh & Redefine, Mielle Organics Pomegranate and Honey Leave-In Conditioner, OGX Quenching Coconut Curls Curling Butter Leave-In or Rinse Out, Shea Moisture Strengthen & Restore Leave-In Conditioner and Suave Professionals Avocado and Olive Oil Leave-in Conditioner.

Take hair supplements

While more studies are needed to confirm the effects of biotin on hair health, some dermatologists share that their patients see visible results. Kidman takes Swisse's Hair Skin Nails+ and credits it for strengthening hair and brittle nails.

True to her word, that's how low maintenance Nicole Kidman's hair care routine is. Below are a couple other curly hair tips to keep your coils and spirals in great shape.

Shampoo less and try co-washing

Shampoos usually have a lot of sulfates and that ingredient strips too much moisture from hair. For curly hair, try using a cleansing conditioner to cleanse hair while keeping it hydrated. Naturally Curly suggests As I Am Coconut CoWash Cleansing Conditioner, SheaMoisture Coconut & Hibiscus Co-Wash Conditioning Cleanser and Ouidad Curl Immersion No-Lather Coconut Cream Cleansing Conditioner. If you're new to co-washing, expect your hair to be oilier than usual in the beginning. Don't worry, it will level out once your scalp gets used to your new routine.

Comb from bottom to top

Curly hair tends to have lots of knots and tangles. To detangle hair properly, use a wide-toothed comb and start combing at the bottom. Detangle the ends first and work your way up slowly until your can comb from top to bottom. Using a wide-toothed comb instead of a brush also helps keep your natural curl pattern stay in shape.

Related article: Co-Washing 101: How To Do It and What To Avoid