Irish hunk Jamie Dornan in the highly anticipated erotic film "Fifty Shades of Grey" loves to belt out co-star Rita Ora's song while taking a break from shooting E.L. James book adaptation. It turns out that the Christian Grey on flesh is a big fan of the British singer who is playing his sister in the movie.

"Behind the scenes, he'll jump into an Irish ditty, or he was singing a lot of Rita Ora," says Marcia Gay Harden who plays Christian Grey's mother in an interview with Entertainment Weekly Radio's "TV Editors Hour." "He's like [in Irish brogue], 'Oh, you got that in brain now.' We're like, 'Come back to America, because you got a scene in a minute.' 'But it's in my brain!' He's sweet."

Dornan who used to be the man behind the microphone for his folk band Sons of Jim back in Ireland is no stranger for singing. More than good looks and chiseled abs, Dornan is a total package of talent and he is currently back in his home country to reprise his role as Paul Spector in BBC Two's "The Fall" Season 2.

Scheduled to hit the theaters on Feb. 13, 2015, "Fifty Shades of Grey" is keeping the fans excited with so many juicy tidbits are coming out after the production was wrapped last month. When asked how she thinks about the movie, Oscar winner Marcia Gay thinks the movie is not "too scandalous."

"But the story is so intriguing, and I think so many people have read it, and it is erotic. ... I like looking and thinking," says the actress who plays Dr. Grace Trevelyan Grey. "'Why did we anthropologically select for erotic pleasure in pain?' It's really interesting to me. And E L James has the answer."

Meanwhile, Jamie Dornan is busy in "The Fall" season 2 productions as he plays the lead role for the crime drama opposite former "X-Files" star Gillian Anderson. The upcoming season will run one episode longer than the five-part Season 1.