Dakota Johnson has landed one of the most hyped-up roles in movieland but the actress’ boyfriend is said to be “nervous” about her lead in the saucy big screen adaptation of Fifty Shades of Grey.

23-year-old Dakota, who previously appeared as Justin Timberlake’s bed buddy in The Social Network, was recently confirmed as Ana Steele by Fifty Shades author EL James, with Pacific Rim star Charlie Hunnam taking on the role of Mr Grey.

But whilst she’s been busy having meetings with James and and prepping for her biggest role yet, Dakota’s long-term love is reportedly getting anxious about just what the film role will involve. Dakota’s beau Jordan Masterson, who’s been dating the actress for about a year, is said to be feeling uncomfortable about his girlfriend shooting explicit scenes. “Jordan is delighted for Dakota in terms of her career, but he’s nervous about all the ‘sex’ involved in the role,” a source has told Grazia.

Perhaps Jordan should have a chat with Charlie’s girlfriend, Morgana McNelis who seems to be much more comfortable with the raunchy film. Charlie, who has already got his kit off countless times in his TV hits Queer as Folk and Sons of Anarchy, confirmed in an interview with HollywoodLife.com last month that his lady is very much on board. The 33-year-old admits it will be difficult for Morgana but believes it will bring them closer together.

“She’s required to share parts of me that she wouldn’t really want to share, so of course with the nature of this role that’s going to be times ten,” he said.