Singer/actress Vanessa Williams has reportedly moved on after her marriage split by dating a toyboy castmate on her new US soap SOUTH BEACH.

Williams, who split from basketball star husband Rick Fox in 2004, fell for actor ROB MACK, who, at 29, is 13 years younger than her, on the set of the new show, which is produced by Jennifer Lopez.

The couple has been spotted out and about in Miami, Florida - where the show is filmed, even holding hands.

Williams' ex-husband is also defying age dating rules - he is reportedly smitten with his new lad love Sharon Stone, who is 11 years older than him.