Her luscious locks and glowing skin are a thing of envy.

Now, actress Mindy Kaling has revealed that her beauty secret lies in prenatal vitamins.

The Office star, 32, writes that her hair stylist, Jen Atkin – who is also responsible for actress Sofia Vergara’s coiffure – recently presented her with a bottle of the specially-formulated pregnancy supplement.

Miss Kaling – who is not expecting – writes on her blog, The Concerns of Mindy Kaling, that the formula ‘will not only scare your boyfriend… it will make your hair grow faster, thicker, and keep your skin glow-y and smooth.

‘At least that’s what it’s done for me, and I’ve not even been using them that long.’

She isn’t the only celebrity who has publicly endorsed the supplements.

In a 2006 interview, Gwyneth Paltrow told Harper’s Bazaar: ‘It doesn’t matter if you’re pregnant or not, I swear to God.

‘I have double-processed blonde hair, and it’s not damaged – those vitamins, they’re the trick! They make my hair grow thick, long, and healthy when I take them.’

Prenatal vitamins tend to contain higher levels of iron, folic acid, calcium and biotin than everyday vitamin formulations.

Biotin, in particular, is said to promote healthy hair, nails and eyes and is found in high levels in many vegetables, berries, goat and cow’s milk, almonds, eggs and halibut.