Movie star Whoopi Goldberg has hailed British royal Prince Edward as "one groovy cat".

The Ghost actress has been enjoying a string of dinner dates with Queen Elizabeth II's youngest son during his recent trip to New York City, but insists they are just good friends.

She tells the New York Daily News, "The prince and I have met a few times, and we were all there with friends. I put him through his paces. Prince Edward is one groovy cat.

"I wouldn't sit with him if he wasn't."