"Fifty Shades of Grey" has become extremely popular since its release, and became a-must-read all over the world.

Many readers flock to bookstores or libraries to read the erotic "Fifty Shades" trilogy. Celebrities also are reading and talking about the book that has everybody opening up about their sex preferences.

The "Fifty Shades" trilogy ("Fifty Shades of Grey," "Fifty Shades Darker," "Fifty Shades Freed"), written by bestselling author E.L. James, tells 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, and both explore Christian's world of BDSM while trying to understand their complicated relationship.

Some recent celebrities were added to the list of stars reading the steamy book.

"Real Housewives of Miami" star Joanna Krupa, 33, was recently caught reading "Fifty Shades of Grey." She was in a pink bikini reading the steamy novel in the open with her fiancé Romain Zago at Miami Beach, according to Daily Mail.

Victoria Beckham recently admitted she's absolutely hooked on the sexy novel.

The former Spice Girl claimed she never read a book but, thanks to E.L. James' raunchy S&M novel, it seems as if she decided to brush up on her reading skills, according to Entertainment Wise.

"I'm halfway through the second one... I even bought my mum the book!" Beckham told Glamour magazine.

"Twilight" star Kristen Stewart has finally admitted she read the book, according to Hollywood Life.

"I'm reading it man," Steward said in an interview with Moviefix in Australia.

According to Complex, there are ten pictures of celebrities who are caught reading the book, including Selena Gomez, Eva Longoria, Ashley Benson, Shay Mitchell, "Mob Wives" Drita D'Avanzo, Gilbert Gottfried, Chris Hemsworth, Charlize Theron, and Ellen Degeneres.

Some celebrities confessed their love for the raunchy novel, which is a part of a trilogy. The other two books are "Fifty Shades Darker" and "Fifty Shades Freed."

Cafemom.com featured a list of celebrities who had something to say about "Fifty Shades of Grey" in last month.

Pop singer and actress Hillary Duff said, ""I feel a little dirty reading that book right now." And as for the movie, she added, "Personally, I would love if Ryan Gosling would do it, but I know he never would."

Ryan Seacrest said, "I'm obsessed. And I'm using it as a manual. I think it can be a study book for a lot of people."

"I've read every book," Ashley Benson said. "I want to play Anastasia."

Of course, Ian Somerhalder, Lucy Hale, and Alexander Skarsgard are in love with these books. We know this because they are running for the roles of the two main characters, Anastasia Steele and Christian Grey.

"I absolutely would be up for that," Somerhalder said. "I have the book and I just started reading it. That would be a pretty incredible thing, and hopefully that could pan out. Yes, beyond the shadow of a doubt I think that would be a phenomenal opportunity!"

Hale said, "I just finished the first [book] - I'm speechless. I think every girl on the carper wants to play [Ana]! That would be freaking awesome. I'm really curious to see how they're going to turn it into a film."

"Where do I sign," Skarsgard said. "He's got a sex chamber? My character [Eric Northman] has that on 'True Blood.' He's got a little dungeon. I was born to play that part."

"One Direction" star Niall Horan, 18, told the Daily Mirror that he recently started reading the book; one of his fans gave it to him, according to Hollywood Life.

"A girl gave it to me the other day," he said. "I read the first page and put it down. But it was good!"

It was reported that Angelina Jolie was reading "Fifty Shades of Grey." Actor Colin Egglesfield, who is a fan favorite to play Christian, read a few lines from the steamy novel (and boy was his voice sexy and deep as ever). 

Many stars also attempted to act out the roles of Ana and Christian.

"Supernatural" stars Matt Cohen and Richard Speight Jr. got down and dirty reading some pages for the erotic book, according to the Huffington Post.

Cast of the new MTV show "The Inbetweeners" took turns reading a few pages from the novel, calling it "Fifty Shades of Inbetweeners."

According to the Examiner, Mark L. Young, Joey Pollari, Zack Pearlman and Bubba Lewis took turns reading "passages" from the novel, while doing their best to stifle laughter.

Pollari wondered, "How often does she (protagonist Anastasia Steele) say, 'inner goddess'? Do a search."

Actors Will Ferrell and Zach Galifianakis also took turns acting out scenes from the book while promoting their film "The Campaign."

"Cosmopolis" star Robert Pattinson never admitted he read the book, but he said he would lick the pages.

"I'd just sit there and lick the pages," he joked while talking to MTV News host Josh Horowitz.

Have you "Fifty Shades of Grey" yet? Share your thoughts below!

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!