'My grandmother MJ read the first one and said she couldn't put it down," Khloe Kardashian tells MTV News.
By Kara Warner

Kim Kardashian & Khloe Kardashian
Photo: MTV News

With book-to-film adaptations being all the rage these days, people just can't seem to stop talking about the latest hot-button page-turner and best-seller "Fifty Shades of Grey." And with the big-screen version of the saucy, S&M-heavy tale on the way, we're doing our best here at MTV News to keep abreast of the latest developments in casting, along with attempts to round up a list of celebrity fans.

When we caught up with in-the-know reality TV superstars Kim and Khloe Kardashian recently, ahead of the premiere of the new season of "Keeping Up With the Kardashians," we asked the sisters for their thoughts on the book and its rise to popularity within the pop-culture zeitgeist. Both ladies apparently have a lot of reading to do.

"[I haven't read it] but everyone talks about it," Khloe said. "My grandmother MJ read the first one and said she couldn't put it down. Now she's on the second one. My grandmother!" Khloe added. "Sexy!" Kim also has yet to read the entire story, but admitted to letting her curiosity get the best of her during a recent plane ride that involved reading over a stranger's shoulder.

"There was someone reading it on their Kindle on the plane [in the seat] in front of me and they were a little older so the font was huge," Kim recalled. "I was bored so I was like leaning forward and reading a full chapter."

"I heard it's a great book," Khloe chimed in.

"It's racy," Kim said.

"Grandmothers gotta live too," Khloe said with a smile.