After Page Six reported the two were caught kissing in New York's Theater District, Thurman and Lucas spoke out about the rumors.
"I would be so honored, but, alas, we just play husband and wife in The Parisian Woman and he's the best fake husband ever," Thurman told Page Six via her rep.
Lucas also weighed in on the reports.
"I would be so honored!" he told the media outlet. "She is the best stage wife ever, and I hope people think our stage chemistry is so good we must be . . ."