Joan Collins reveals how she would wave her style wand over the Duchess of Cornwall... "Then prior to applying a light moisturiser, she should use my magic serum, Age.Less 15 by Cellex, which I swear by."

Looking Good, Feeling Great, Time For Your Skin Mot
Cellex-C High-Potency Serum, £80 and Fade Away Gel for Sun & Age Spots, £45. For stockists, tel: 0845-740-2214. Fans of this cult product range include Renee Zellweger and Oprah Winfrey.

Vital Vitamin C
If you long for a salon-style treatment but don’t want to splash out, you could try the DIY version of a vitamin C facial. Vitamin C is renowned for its powerful antioxidant and anti-ageing properties and it can also help fade age spots and freckles…Another try-at-home product that can achieve similar results is Cellex-C High-Potency Serum. This is recommended for use once a day followed by your usual moisturiser…Cellex-C High-Potency Serum, £75. For stockists, tel: 08457-402214. Celebrity fans Calista Flockhart and Lucy Liu.

“The results of long- term use of Cellex-C complex containing vitamin C, zinc sulphate and the amino acid tyrosine - are impressive with noticeably firmer skin and considerable reduction in the appearance of lines and wrinkles.”