People just can't stop talking about "Fifty Shades of Grey." E L James has set the literary world on fire with an erotic novel that explores the relationship between a dark and mysterious guy named Christian Grey and Anastasia Steele, an innocent college graduate.
The guilty-pleasure book features characters that James created in her "Twilight" fan fiction, and it's now being made into a feature film. That, of course, has had Hollywood buzzing with casting rumors about who could play the role of Christian Grey.
Fans of the trilogy already have strong opinions about the part, so MTV News caught up with some experts for their take.
"Christian definitely needs to be clean-cut, but extremely sexy when disheveled," Alison Genet of Twifans.com told MTV News. "I wouldn't choose a man that is overly chiseled. No juicehead gorillas need apply. Hair that can be neatly brushed, but when playing, it's loose and wild like Johnny Depp hair. Not super short."
Of course, the physical look of the actor has to fit, but Christian is also a complex individual, and most fans want an actor who can pull off all his many dimensions.
"I just think that the actor needs to be able to portray being so intense," said Mags Vazquez from Laters, Baby!, "But also showing that vulnerability that he has in reality."
Casting rumors for the part of Christian have been heating up as of late, with names like "Twilight's" own Robert Pattinson coming up. So, do fans want to see Pattinson make the transition from Edward Cullen to Christian Grey?
"There's the side that first fell in love with the characters as part of 'Twilight' fan fiction and can only see Robert Pattinson as Christian and/or Kristen Stewart as Ana," Lisa Parker from FiftyShadesFilm.com explained. "Would we be disappointed if he/she/they were cast? Absolutely not."
Others disagree, however. "In regards to Robert Pattinson, I would like to see them move away from 'Twilight' so it can get its own identity," Crissy Maier of Laters, Baby! said.
Well, if Pattinson doesn't land the role, there's a chance another vampire could step in: "Vampire Diaries" star Ian Somerhalder.
"I think Ian seems like a good fit visually, I haven't watched 'Vampire Diaries,' but what I hear about his acting skills there, I'm hearing good things," Maier said.
Parker agreed, revealing that her readers have been backing Somerhalder since he expressed interest in the role during an interview with Ryan Seacrest.
"We're excited to see actors step up and say they would be interested in playing the leading man," Parker said, adding, "With Ian Somerhalder being the first and a popular candidate judging from our Twitter timeline."
These super fans have suggestions of their own though, ranging from Matt Bomer to "Man of Steel" star Henry Cavill. Not surprisingly, Ryan Gosling is also a favorite.
"We are fans of the love story too, so we know exactly what qualities 'FSOG' fans see in different actors and actresses that make them appealing for the roles," Parker said. "Have you seen the Dunhill London ads featuring Henry Cavill? Do they not scream 'Fifty'? Have you seen Ryan Gosling's GQ photo shoot? Grey silk tie anyone?"
Genet of Twifans.com agreed, saying Gosling's undeniable charm could make him the perfect Christian Grey: "Ryan Gosling, Ryan Gosling, and Ryan Gosling. Imagining him in jeans hung low on the hip."
"The one thing we know for sure is that with E L James as a collaborative partner in the casting process, we are confident that she will do what's in the best interest of her famously loved characters." Parker said.
Who do you think should play Christian Grey in the "Fifty Shades of Grey" movie? Let us know in the comments!