Jamie Dornan may not think he's good at auditions, but that didn't stop him from landing the role of Christian Grey (after Charlie Hunnam dropped out) in the highly-anticipated movie adaptation of E.L. James' bestselling erotic novel "Fifty Shades of Grey."

According to the model-turned-actor, if it wasn't for "The Fall" writer Allan Cubitt, he wouldn't be on the BBC2 show.

"I'm not very good at auditions," he said according to Daily Mirror. "I don't sell myself well. I didn't do a good audition for 'The Fall,' but the show's writer, Allan Cubitt, saw something in me. I think he had to work pretty hard to convince everyone else."

Cubitt reportedly told British Vogue that he saw "potential" in the Northern Irish actor.

"You only need to meet Jamie once to realize that he has a huge amount going for him beyond being physically attractive," he added.

Dornan must have shown similar potential in his audition for "Fifty Shades of Grey." His father encouraged him to take the part of the S&M-loving billionaire.

"[Dad] was all for it,' Dornan said. "I don't come from a cagey family. We're fairly liberal."

The actor added that he was not intimidated by all the assumedly plentiful sex scenes with co-star Dakota Johnson, who plays Anastasia Steele.

"I'm not really fearful of that stuff," he explained. "It's just work. It's strange work, sure, but it's still work. I just get on with it."

According to Gillian Anderson, who co-stars alongside Dornan in "The Fall," "Fifty Shades of Grey" won't give the rising actor a big head.

"Jamie is one of the most grounded people I know," she told InStyle. "... He's got it all in perspective and has a very appropriate and right-sized take on all of this. I don't think he needs any advice."

"Fifty Shades of Grey" hits theaters Feb. 13, 2015.

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Follow Scharon Harding on Twitter: @ScharHar.