Claudine De Niro, who filed for divorce from the "Raging Bull" star's son, Raphael, in 2016, has recently been spotted on Cuba's arm at numerous Art Basel Miami events, where they have been openly flirting and kissing, according to the New York Post's Page Six.
"I wouldn't say they are dating, but they are hooking up," one source told the outlet.
They have also been snapped enjoying a beach day in Miami.
Cuba, 50, has yet to comment on the reports, but he has been living it up as a single man ever since separating from his wife, Sara Kapfer, in 2014 after 20 years of marriage.
"The American Crime Story: The People v. O.J. Simpson" star began divorce proceedings in early 2017, and requested joint custody of their only minor child, 13-year-old daughter Piper. They also share sons Mason, 22, and Spencer, 24.