Fans of Jaime Dornan had a lot to be thankful for "Sons of Anarchy" alum Charlie Hunnam for the opportunity of playing the sexy and dashing billionaire Christian Grey in E.L. James movie adaptation of "Fifty Shades of Grey."

It was back in 2013 when "Pacific Rim" star Charlie Hunnam was originally chosen for the lead role in "Fifty Shades of Grey," but his fans were flabbergasted when he pulled out a few weeks after being cast.

Until now, Charlie Hunnam's decision of leaving "Fifty Shades of Grey" continues to haunt him.

Hunnam revealed, "It was very, very painful for me, that whole process, just very unpleasant. I felt like I let myself down. I let those people down on Fifty Shades that I'd grown to really love and respect. It's just a really unpleasant period of time for me," as per Entertainment Weekly.

Conflicts with filming schedules was the deciding factor why Charlie Hunnam had to let go of the opportunity of portraying the mysterious Christian Grey in "Fifty Shades of Grey." He had just finished doing the final and sixth season of "Sons of Anarchy," his hit TV series on FX and had already signed on to Guillermo del Toro's horror flick "Crimson Peak."

These factors weighed in coupled with a few "big personal stuff going on in my life," as Hunnam disclosed to EW in 2014, which left the hunky actor fatigued and suffering from anxiety regarding his capability to deliver as "Fifty Shades of Grey's" BDSM-obsessed bachelor Christian Grey.

Hunnam appears on the cover story of EW this week featuring his lead role in "King Arthur." He said, "For the first time in my life, [I] had more work than I had time to do it. It's very hard to be disciplined in that situation and understand what is going to be required to all of that work to the best of your ability and have yourself surrounded by people."

"You see it all the time in Hollywood. There's a tendency to make hay while the sun shines and to capitalize on every second once somebody gets hot and people just get burnt out. That's what I started to do," added Hunnam.

Meanwhile, according to Comic Book, his latest take on the famous leader of the round table, "King Arthur," directed by Guy Ritchie is "a little bit rough around the edges, but basically a survivor."

Hunnam detailed: "He's a hustler. He's a street kid. There's definitely a harder edge to him than people would imagine. It's sort of classic Guy Ritchie stuff."

Director Guy Ritchie added, "I think where the pitfall has often been is trying to make King Arthur bland and nice, and nice and bland. The two qualities make rather compatible bed companions. Unfortunately, they're not interesting to watch. Luke Skywalker was always the most uninteresting character in Star Wars because he's the good guy. Good guys are boring," as per Hollywood Life.

In the end, Charlie Hunnam leaving "Fifty Shades of Grey" did more good to him — of course also to Jaime Dornan who now have established a large following.