Celebrity Gossip reports: “They’ve been dating for a few months,” the insider said, adding, “I think Rose is a good match for him.”
Speculation started swirling after the pair were spotted cuddling up at the “Killing Them Softly” after party in New York City last month.
“They were sitting in a booth and he had his arm around her and they would kiss from time to time,” an eyewitness revealed. “They definitely tried to keep a low profile and left at separate times.”
Before their current romance, Cannavale was married to actress and screenwriter Jenny Lumet, whom he shares a son with, while Byrne has been linked to Brendan Cowell and Gregor Jordan.