Alexa Chung thinks she dresses like "a granny".

The British-born model and TV presenter revealed that while her friends tell her she dresses like someone much older than her 27 years, she thinks her "geeky" style is cool.

She explained: "Everyone says I look like a granny. I do sexy sometimes, but never sl*tty. I'm quite proud that geeky, asexual dressing has become cool. It's good to promote a different look. It's cooler to get something for a fiver in a charity shop, than spend five grand in Versace."

However, the style icon advised she doesn't take any fashion advice from Arctic Monkeys rocker boyfriend Alex Turner.

She said: "I reckon I've got it nailed, so if he doesn't like what I'm wearing, he's the one who's wrong. I say, 'You just stick with the music'."

The svelte star - who has been accused of having an eating disorder in the past - also admitted she finds criticism about her weight very "frustrating" as she is naturally very thin.

Alexa added to Britain's Elle magazine: "I cannot express how frustrating it is to not be believed when you say, 'I don't have an eating disorder'. I am naturally very thin. I get even thinner when I'm stressed.

"It angers me because I don't want to be a pin-up for young girls just for being thin. I don't want to be admired for being thin, as opposed to being dressed well, and I don't want the two to get confused."