'Fifty Shades of Grey' Author Says She Has Shortlist for Lead Roles in Film Adaptation (Video)

One of Katie Couric’s first major interviews on her show, Katie, was with Fifty Shades of Grey writer E.L. James on Monday.

our editor recommends

'Fifty Shades of Grey' Movie Producers Considering Surprising Screenwriters (Exclusive)

E.L. James' Husband Calls 'Fifty Shades of Grey' Lead Christian Grey 'a Mess' (Video)

Fifty Shades of 'Inbetweeners': MTV Cast Gives a Dramatic Reading of the Erotic Novel (Video)

The stage was designed with sexy red lighting to celebrate the arrival of the writer of the hit erotic novels, which follows a young woman named Anastasia Steele, who falls into a tumultuous sexual relationship with a successful business magnate, Christian Grey.

PHOTOS: 11 Biggest Book-to-Big Screen Adaptations of the Last 25 Years

There has been much discussion about casting for the film adaptation. Universal and Focus nabbed rights to the trilogy for $5 million in March after a heated Hollywood bidding war.

An audience member made sure to ask James, who has retained some creative control over the movie’s casting, if she has decided on who would take on the lead roles of Anastasia and Christian.

“I have three people who could play Christian and I think four who could play Anna, and I’m not going to tell you any of them,” she told the audience.

EXCLUSIVE: 'Fifty Shades of Grey' Movie Producers Considering Surprising Screenwriters

Couric had done her own poll of fans online, finding that Vampire Diaries’ star Ian Somerhalder and former Gilmore Girls actress Alexis Bledel were the top choices.

When an audience member asked James if she would consider writing another book from Christian Grey's perspective, James said "maybe," but added that it wouldn't be any time soon.

"I'd like to try and write something else, and then maybe revisit this," she said.

James also spoke about her reaction to the massive success of the books, which have sold more than 40 million copies worldwide.

"It just shocks me every time,” she told Couric.

Watch part of the interview below.