So what does he think about the Northern Ireland actor nabbing the part?
"I think Jaime is a great choice. I think he's got an edge to him and he's a good looking guy," Colin told Life & Style exclusively at the Lucky Brand Store opening in Beverly Hills this week. "He's going to do a really good job."
Though Colin lost out to him, he's not disappointed about it.
"It's a tough thing because you never really know how that is going to turn out. I haven't read the books, but I know pretty much the whole thing is what it is and what it is going to be," The Client List star explained. "I am sure there are a lot of very talented people attached to it, so I am sure they're going to do a great job with it."
In fact, he's a little relieved that he won't portray the character, who's a 27-year-old billionaire with a secret fetish for all things BDSM.
"I just know my mom would have a hard time watching that movie if I was in it and a lot of my friends would, too," Colin told Life & Style. "I would never hear the end of it from my friends knowing that I had to use a writing prop, handcuffs and all that stuff in front of millions of people."
Variety revealed that Jamie landed the role on Oct. 23 – nearly two weeks after Sons of Anarchy star Charlie Hunnam dropped out of the part due to his "immersive TV schedule."
— E L James (@E_L_James) October 24, 2013