50 Shades of Grey Movie Casting RUMORS: Allison Williams Sparks Kinky Anastasia Steele Buzz, Ian Somerhalder or Henry Cavill Sexiest Christian Grey Match? [PHOTOS/POLL]

The kinky "Fifty Shades of Grey" casting rumors never seem to end... and the latest actress to enter the sexy Anastasia Steele running? Stunning "Girls" starlet Allison Williams! Although the 24-year-old HBO beauty initially claimed that she'd never be interested in filming a nude scene, it turns out that E.L. James' erotic novel has caught her curious eye... do fans think she'd make Christian Grey's perfect leading lady? Ian Somerhalder and Henry Cavill remain two of the hottest Mr. Grey contenders - which Hollywood heartthrob would fans like to see team up with the brunette beauty? Read on for more "Fifty Shades" juice!

Williams is one of the few actresses on the hit HBO comedy/drama "Girls" who has YET to film a nude scene (like producer Lena Dunham). According to Opposing Views, Williams said not too long ago - "Right now, I don't see myself ever doing nude scenes. Once you do them, you can't take it back because of the way Google Images works. I also think that unfortunately nudity seems to overshadow some of the more brilliant things that are going on."

Because of that, Williams was initially hesitant to express interest in the kinky role of Ana Steele - "I wouldn't take it... It is just too much for me but I applaud whatever actress steps up to the plate and I can't wait to watch it."

But now...

"I am reading [Fifty Shades of Grey]. I'm very intrigued by the book, very entertained by it," Williams said. "And I actually love riding the subway and seeing people reading their Kindles sort of surreptitiously [reading] and I'm always wondering whether or not they're reading Fifty Shades of Grey in secret... I'd have to read the script, but given that it's very explicit in nature, I would say that I'd leave that up to a daredevil ... we'll see."

Well that's a complete change of heart! Apparently Williams is rather turned on by the seductively charming Mr. Grey... wonder if she could transfer that passion onto the big screen!

Williams has that cute-and-innocent girl next look. Her character on "Girls" (Marnie Michaels) is a rather outspoken, headstrong individual... quite different from the quiet and introverted Ana Steele. But both characters are recent college graduates trying to find their place in the world as strong and independent women... while still attempting to satisfy their sexual desires and curiosities. Maybe it's the perfect fit!

Now, which one of these drool-worthy heartthrobs would "Fifty Shades" fans like to see swoon Steele's (Williams') kinky heart...

Ian Somerhalder, 34, "Vampire Diaries" -

Some fans think that Somerhalder has the perfect look and attitude to portray the suave, handsome, and successful businessman Christian Grey. Those piercing eyes and that silky brunette mane could probably do the trick, and his role as the sexy, "bad boy" vampire Damon Salvatore in the hit CW television series "Vampire Diaries" leaves some fans swooning.  

Henry Cavill, 29, "The Tudors" -

The clean-cut, handsome British "Superman: Man of Steel" heartthrob was recently named Fandango's "Breakout Star" of 2013, which only helped to stir such "Fifty Shades" buzz. Cavill also won the title of having the "best and sexiest Christian Grey body" in a recent "Fifty Shades" Twitter casting poll. Do fans agree?  

So how about it, "Fifty Shades" enthusiasts? Cast your vote in the latest Mstars poll!