She’s famous for her voluminous brunette locks – and Nigella Lawson appears to have let slip the secret behind her bouncy style.
The food writer, 60, revealed that she uses dry shampoo on her roots before bed for perfect morning hair.
In a column for The Sunday Times’ Style, the cookery star explained that the unlikely step means that “grime and grease” will disappear overnight while you sleep.
She wrote: “Don’t spray on dry shampoo in the morning and then beat yourself about the head with your hairbrush trying to get it all out.
“Blast yourself with it before you go to bed and when you wake up in the morning it will have disappeared, taking the grime and grease with it.”
Lawson also shared her £20 product of choice, adding: “A basic, low-cost can of dry shampoo is more than adequate for the job (although I do love the smell of Kevin Murphy’s Fresh Hair).”
It comes as the star opened up in January about why she won’t stop colouring her grey hair its trademark brunette shade.
She said: “I remember both my grandmothers being in their forties; by the time they were in their sixties, they’d fully embraced grey-haired old age.
“I know only three women my age who have grey hair, and while they look wonderful, I’m certainly not ready to stop getting my roots done.
“My story to myself (should I have to put it in words, and I don’t as a general rule) is that while I have more than a few grey hairs, I am not actually grey.
“But I’m not prepared to find out. I hide from myself that by dyeing my hair, I am pretending to be younger than I am, because I’ve been dyeing my hair since my teens.
“I’ve always rather looked forward to the Anne Bancroft/Susan Sontag/Cruella de Vil years, when I have a dramatic dark bob with a switch of white at the front, but somehow the time when I adopt such a look seems ever in the faraway future.
“My concession to hair and ageing so far is that I don’t dye my hair as dark as I used to (too draining) and it’s a lot shorter than it used to be.”