(Cover) - EN Showbiz - Kristin Cavallari and her Dancing With The Stars partner Mark Ballas have reportedly grown very close.

Star magazine claim that the reality star has been getting over her breakup with fianc Jay Cutler by sparking up a romance with Mark.

The pair have been working hard to perfect their routines ahead of the season premiere of the hit television competition show.

But an eyewitness says that the pair were "all over each other" during a dinner in West Hollywood last week.

"She was sitting on his lap while he was nuzzling her neck," the insider told the publication.

"They were having dinner with Derek Hough but didn't pay him any attention. They were consumed with each other. You can tell she is really into him.

"Kristin was having a great time! They definitely look like more than friends!"

A source told the magazine that just a few days prior, the couple were "definitely very comfortable together and extremely flirty" while at a friend's birthday party.

"By the end of the night they were being cuddly together in a dark booth. They didn't leave each other's side all night and were constantly holding hands and touching."

Mark was romantically linked to American Idol star Pia Toscano earlier this year. (C) Cover Media