For her new film, Helen Mirren traded her signature silver hair for a brown wig and a bare, make-up-free face. In Anton Corbijn’s A Talent for Murder, she plays a reclusive novelist inspired by Patricia Highsmith. The actress admits she “had to let go” of her ego to embrace the look.

Offscreen, her famous glow comes from a far humbler place. The Oscar winner who played Elizabeth II in The Queen swears by a drugstore beauty staple. Indeed, it has lived in bathroom cabinets for generations.

Her secret is castor oil, a thick golden elixir she applies in tiny amounts from head to fingertips. In an age of twelve-step routines and pricey serums, her approach feels refreshingly minimalist. It is proof that a humble bottle and a little patience can go a long way.

Helen Mirren’s Castor Oil Secret

In 2021, Helen shared a photo of a castor oil bottle on Instagram with a witty caption. “Things I like… Castor oil, not for its laxative properties, but for hair, skin, nails in tiny amounts,” she wrote. It was a spontaneous post, the kind of honest, unfiltered tip her fans adore.

Why Castor Oil Works for Hair

Pressed from the seeds of the castor plant, this oil has an ancient story, since Egyptians already burned it in their lamps. Cosmetic chemist Danusia Wnek explains that it “acts as a lubricant, coating and conditioning strands to improve smoothness and shine.” Experts still recommend using it with caution, especially on oily or acne-prone skin.

Castor Oil’s Social Media Comeback

Lately, castor oil has become a cult favorite online, where beauty fans swipe it onto their lashes and brows before bed. Others love it for slow, soothing scalp massages. Dermatologists note that research is still limited, so enjoy it as a calming ritual and keep expectations realistic.

How to Use Castor Oil Like Helen

Follow her golden rule and use just a drop. Massage it into the ends of your hair before washing, or smooth it over dry cuticles at bedtime. Because it is very thick, you can blend it with a lighter oil, such as jojoba or sweet almond. If your skin is sensitive, try a patch test first.

Helen Mirren’s Nighttime Moisturizer

L’Oréal Paris, Revitalift Triple Power Face Cream, $ 32.17

Her evening ritual is equally simple. “I have no beauty routine, except I do always clean my face at night,” she said. Her favorite cream is the L’Oréal Paris Revitalift Triple Power moisturizer, from the brand she has represented since 2014. Clearly, the most regal glow begins at the bathroom sink, one tiny drop at a time.