"Fifty Shades of Grey" fans are still wondering who will play their favorite characters, Anastasia Steele and Christian Grey.

While more and more speculation hits the Internet, more and more stars are put on the potential "Christian Grey" list. The newest candidate (or maybe not so new for some of you) is "Supernatural" star Jensen Ackles.

According to What Culture, Ackles is listed as number one on their list of ten actors that should play mysterious Christian Grey.

"Ackles would bring the necessary dark mystique, and he is another actor who has been suggested by fans," What Culture wrote. "He would certainly be a marketing savvy pick, because fans of Supernatural have been calling out for the opportunity to see him in a more erotic role for some time now."

The bad news is that he might be just a little too clean-cut for the part.

Ackles plays Dean Winchester on "Supernatural." Most of the time he's busy hunting down supernatural beings, such as vampires and fallen angels, with his little brother Sam (played by Jared Padalecki).

"Fifty Shades of Grey," written by bestselling author E.L. James, is the story of 22-year-old recent college grad Anastasia Steele, who enters into a dominant/submissive sexual relationship with 27-year old sexy billionaire Christian Grey, through an "agreement," and both explore the world of BDSM (bondage, dominance, submission, masochism).

According to Gather Entertainment, Christian needs to be played by someone who has the ability to portray a character with a dark past, which is something most vampires have (even though Christian is not a vampire, but he is based on "Twilight" character Edward Cullen).

"He might not be used to dealing with dangerous-looking sex toys, but his Supernatural character is pretty good at handling a variety of different weapons and knows a lot about torture," Gather Entertainment wrote.

Other actors are also linked to play the desired role.

Recently, fans revealed that they want "The Vampire Diaries" star Ian Somerhalder to play the dominating Christian Grey in the adaption of James' bestselling erotic novel.

Somerhalder has been showing that he wants to play the role of Christian. Last month, he even held a sort of campaign on his Twitter, making it clear that he's more than qualified to take the role, according to The Hollywood Gossip.

Other stars that are rumored to play the two roles are "Immortals" star Henry Cavill, and "The Hangover" star Bradley Cooper. Some fans also said they wanted "The Dark Knight" star Christian Bale to be the S&M crazed billionaire. Recently, at the HBO panel at Comic-Con San Deigo, "True Blood" star Alexander Skarsgard said that hasn't been offered a casting part to play Christian Grey, nor has he read the book or seen a script

"Magic Mike" star Channing Tatum revealed that he would like to be Christian, but only if his wife, Jenna Dewan-Tatum, were going to be Anastasia.