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A handful of hairstyles stood out at the 2026 Emmys, but Nicole Kidman‘s effortless, undone bun is one we find ourselves bookmarking and wondering how to recreate. Is there a product behind Kidman’s enviable bulk? K18 AstroLift™ Repair Volume Spray is a lightweight, volumizing hair thickening spray that is perfect for fine hair.
Hairstylist Lorenzo Martin sprayed the formula on the roots of Kidman’s towel-dried hair for instant lift, and we’ve officially added the product to our fine hair arsenal.
Get the K18 AstroLift™ Repair Volume Spray from Amazon for $46! Please note that prices are accurate as of the date of publication but are subject to change.
You may know K18 for its viral leave-in mask, but if you’re after thicker-looking hair, this spray is worth exploring. Like the mask, this formula contains the brand’s K18PEPTIDE™, a patented peptide technology designed to repair hair damage as you style. Meanwhile, the volumizing blend of hair fibers works on the outside of the hair strands, making them look and feel thicker.
According to K18, the blend can increase the diameter of individual hair fibers by up to 25% and helps create fullness from roots to ends, rather than concentrating volume at the crown.
Plus, if hard, crunchy hair is the reason you’ve been avoiding volumizing products, this product is specifically formulated with touchability in mind. Instead of relying on a heavy coating to support hair, AstroLift creates a flexible, mobile body that can be built up depending on how much volume you want. The formula is also moisture resistant, which helps prevent newly sculpted fullness from instantly flattening.
It’s also refreshingly low maintenance when it comes to application. You can use the spray on dry or towel-dried hair, so whether you’re starting with a fresh wash or just trying to revive strands on the second day, it’ll work. Shake the bottle, hold it about 4 to 6 inches away, and spray generously into the roots and hair. Heat isn’t necessary for the formula to work, but if you want to maximize volume, K18 recommends blow-drying after application (making it easy to recreate Martin’s Kidman technique at home).
One Amazon reviewer said it “brings life to my thin hair,” while another shopper noted: “This stuff really works! I have super straight, super thin hair. This stuff makes my hair look thicker, especially on the top.” According to another shopper, it also adds a “nice texture” without being “crunchy.”
There may be a celebrity hairstylist behind Kidman’s red carpet bun, but the volume trick itself couldn’t be easier to replicate. Buy K18 AstroLift™ Repair Volume Spray from Amazon and test Kidman’s root-boosting secret!
Get the K18 AstroLift™ Repair Volume Spray from Amazon for $46! Please note that prices are accurate as of the date of publication but are subject to change.
Between her signature layered cut and honey blonde strands, Jennifer Aniston has long been a hair inspiration for many. But is there anything we’ve been noticing more lately? How shiny and healthy the star’s curls look. Aniston is responsible for the product: Lolavie’s Glossing Detangler is a heat-protecting, shine-inducing, fly-away softening multitasking formula. […]