Victoria Beckham has revealed that she is a fan of the erotic novel Fifty Shades of Grey.

The fashion designer confessed that she is now reading the second instalment of E L James' trilogy, Fifty Shades Darker. The 38-year-old star also convinced her mother, Jackie Adams, to read the books, but is too embarrassed to discuss their content with her.

She told the new issue of America's Glamour magazine: "I'm halfway through the second one. I even bought my mum the book! But every time she tries to engage in conversation about it, I kind of dodge the subject.

"I don't really want to talk to my mother about S&M."

As well as modelling for a photo shoot in Glamour, Beckham also guest edited the September issue the popular magazine.

She said of the experience: "It’s been exciting for me to see my ideas come to life, from type colours to photo selection to casting."

Beckham opened up about why she rarely smiles for photographers, saying it has become part of her image now she's a designer.

"I actually used to smile a lot in pictures. I think I only stopped smiling when I got into fashion. Fashion stole my smile!

"I’ve created this person. And I’m not saying that’s not me, but I wouldn’t say that’s the whole me. It’s an armor that goes up."