Robert De Niro has been diagnosed with prostate ... including Uma Thurman and Naomi Campbell. He and his wife Grace Hightower are reportedly back together after a number of legal battles.

Drena De Niro/Instagram Drena De Niro is speaking ... "Drena heartbroken for you, such a Duo, i can’t imagine how you must feel," Naomi Campbell said in a comment. "May the lord cover you ...

Robert De Niro's legendary New York City restaurant ... ate at the grill during it's three and a half decades, include Naomi Campbell, Billy Crystal, Mick Jagger, and Paul McCartney.