Bobby Cannavale's girlfriend has always been a hot topic that most fans of the "Boardwalk Empire" star want to know or talk about. But who is Bobby Cannavale's girlfriend really?

According to several sources including Us Weekly, Bobby Cannavale's girlfriend is 34-year-old Rose Byrne.

Now Rose Byrne's name may sound very familiar to many since the beautiful  Australian actress has actually starred in a couple of successful films such as "Insidious 1," "Insidious 2," "Bridesmaids," "I Give It A Year," and the most recent one that stars Zac Efron, Seth Rogen, and Dave Franco, "Neighbors."

Bobby Cannavale's girlfriend and the TV actor reportedly started dating way back in 2012.

Back then, sources told Us Weekly that the two "have been dating for a few months." One source even claimed that "Rose is a good match for him."

Bobby Cannavale and his pretty girlfriend were first spotted getting touchy and feely at the "Killing Them Softly" afterparty at No. 8 in New York City on Nov. 26.

"They were sitting in a booth and he had his arm around her and they would kiss from time to time," an insider gushed. "They definitely tried to keep a low profile and left at separate times."

In 2013, at the Emmy Awards, Bobby made a very lovely speech when he won for Outstanding Supporting Actor in a Drama Series for his portrayal of Gyp Rosetti. However, it was not only the "thank yous" that made everyone smiling and clapping, but also the actor's heartfelt message to his girlfriend, who was also with him at the event dressed in a pink Calvin Klien ensemble. "And I want to thank the love of my life, Rose!" Awwwwwwwww.

Recently, Bobby Cannavale's girlfriend and the 44-year-old actor took part in the "Annie" remake, where they are portraying a a newly written couple for the fresh storyline of the movie.

Additionally, Bobby Cannavale's girlfriend has many things going on her plate. Apart from "Neighbors," the Australian beauty has a Broadway gig by joining the upcoming revival of Moss Hart's "You Can't Take It With You," which begins this August, according to Variety.

Prior to dating Rose Byrne, Cannavale was married to Jenny Lumet from 1994 to 2003, and they have a son Jake, 19. Following his divorce, the actor dated Annabelle Sciorra, Alison Pill and Sutton Foster.