Ronnie Wood and fiance Sally Humphreys. (WENN.COM file photo)

Ronnie Wood's fiancee Sally Humphreys has defended the 31-year age gap between the pair and refuted accusations she is marrying the veteran rocker for his money.

The Rolling Stones star, 65, announced plans to marry the theatre producer in October after a whirlwind romance which began earlier this year.

The couple plans to marry in early 2013 and Humphreys has now opened up about their relationship in a candid new interview.

The 34 year old reveals she feels hurt by criticism of her romance with Wood, insisting they have been been subjected to "disrespectful, spiteful and rude" comments about their engagement, but she is adamant the age gap doesn't stop her loving the famous musician.

She tells Britain's Evening Standard newspaper, "There is an age gap. I would prefer it if there wasn't but there is. But maybe I'm a bit older and he's a bit younger at heart... I could be struck by lightning or knocked down by a bus. I can't not allow good times now because in 20 years' time it will be different...

"He is phenomenally talented and very funny. He's an artist and a musician, and he's very entertaining. People always say, would you still be going out with him if he was a bin man (garbage collector). Well, if the bin man could play guitar and paint pictures and was hilariously funny, yeah, I would...

"You read these unkind comments... opinionated articles not backed up in fact, about this horrible old man who dyes his hair and doesn't put his teeth in... it's just lies."

She goes on to deny having any financial motivation in marrying the rocker, adding, "People say, are you a gold-digger, are you this, are you that? I'm not. If I was, I wouldn't be at work every day. But I suppose only time will tell."

Wood split from Jo, his wife of 23 years, in 2008 after he had an affair with waitress Ekaterina Ivanova, and he was previously married to Krissy Findlay from 1971 to 1978.