Billy Joel's ex-wife was spotted hugging former U.S. presidential hopeful Hillary Clinton while dining at fashion mogul Ralph Lauren's The Polo Bar in New York City on Wednesday night (14Dec16), and it has since emerged Christie was at the restaurant with a date - and it wasn't just any man.

According to People.com, the blonde beauty was enjoying a night out with revered producer Foster, months after Christie split from rocker John Mellencamp.

Brinkley and Mellencamp had been dating for just under a year before calling it quits in August (16), blaming their busy schedules for the break-up.

"Both the mileage between their homes and their heavy career demands interfered with their ability to maintain the relationship," a spokesperson for the pair explained at the time. "They vowed to remain best of friends."

Christie, 62, lives in the Hamptons, New York, while John is based in Indiana.

Meanwhile, Foster has been single since separating from another former model, Yolanda Hadid, at the end of 2015 after four years of marriage.

"Sadly we have decided to go our separate ways," the couple announced in a statement at the time of their split. "We've shared nine beautiful and joyous years together. During that time we experienced love, friendship and the inevitable challenges that come with managing a marriage, careers, blended families and health issues."

Yolanda filed for divorce in January (16), citing irreconcilable differences. She outlined her need for spousal support in her paperwork, but David moved to block the request in May (16).