Who wouldn't want to play a lead role in the upcoming "Fifty Shades of Grey" movie?

Even though most fans would see playing the roles as a privilege for many celebrities, there are just some actors and actresses who wouldn't dare do a role as kinky as Anastasia Steele and Christian Grey.

According to NOW magazine, when told she was hotly-tipped as a favorite for Ana Steele,"Pirates and the Caribbean" actress Keira Knightley said that she would definitely not play the innocent 22-year-old recent grad.

"Absolutely not! Just from what I've heard - f*ck no,' Knightley said.

"The hardest thing to capture about love is the actual physical intimacy between two people. The way two people behave when they are next to each other and touching each other.

"That's a difficult thing to capture on film."

The 27-year-old actress claimed that after working on stressful and emotional scenes for "Anna Karenina," she is enjoying the chance to work on more light-hearted projects and doesn't intend to attempt another intense role for a while.

"I wanted to do something happy and positive and just have a bit of a break from that," Knightley said.

So, to all Keira Knightley fans, the actress does not get down with kinky f***ery.

Other also denied roles in the hotly anticipated erotic film.

In early August, "Sex and the City" actress Kim Cattrall denied that role as Mrs. Robinson.

"No one has told me about that, but I thoroughly enjoyed the book," she is quoted as saying in The Sun.

Elizabeth Olsen squashed rumors that she will consider playing Anastasia in the steamy movie.

In an interview with Bullet, Olsen replied, "No! No! No!"

She added, "But it's had a huge impact on society. Apparently rope sales have skyrocketed because women who've read the book are really getting into bondage, which is kind of great. It's such a taboo for women to actually discuss sexuality without the help of Cosmopolitan."

Michael Fassbender recently denied the rumor of him being Christian Grey, according to Daily Mail

"I haven't even read the book," said the 35-year-old Irish-German actor, who bravely stripped for a controversial sex scene in the movie "Shame."

"You get your privates out and people assume you are some sex maniac."

So, to every "Fifty Shades" fan, who do you want to play Ana and Christian? They will be featured in two new polls!

Click HERE to see who the front-runners are this week for Christian and Ana.

Click HERE to vote for Anastasia Steele!

Click HERE to vote for Christian Grey!

Vote for your favorite couples to play Ana and Christian HERE!

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