Since it was announced the “Fifty Shades of Grey” series would head to the big screen, fans have been obsessed with any little details about the upcoming film. While the biggest speculation is who will play the best-selling novels' main characters, author E.L. James announced a new detail about the “Fifty Shades” movie on Wednesday.

“I'm delighted & thrilled to let you guys know that Sam Taylor-Johnson has agreed to direct the film of 'Fifty Shades of Grey,'” she announced on her Twitter account.

Taylor-Johnson, who's known professionally as Taylor-Wood, is a 46-year-old British filmmaker who made her directorial debut with 2009’s “Nowhere Boy,” a film about John Lennon’s childhood. She's married to actor Aaron Taylor-Johnson, who's 23 years her junior. The couple have two children, Wylda Rae, who's turns 3 in July, and Romy Hero, who's 18-months old, said.

James has been pretty tight-lipped about details of the movie, so any official news is exciting for fans. Last year, Britain's Kelly Marcel was announced as the screenplay writer. Marcel has also served as co-creator and executive producer of the Fox-TV series "Terra Nova" and she is producing "The Madonnas of Echo Park" for HBO.

Meanwhile, Celeb Dirty Laundry reports the “Man of Steel” star, Henry Cavill, is one of James’ favorite choices to play her sadistic lead, Christian Grey. James still retains some creative control, and she's always been very vocal about her support for Henry as Grey. The entertainment news site said the choice of Cavill would be fitting since the novels started as "Twilight"-fan fiction and Stephanie Meyer originally wrote "Twilight" with Cavill in mind to play Edward.

James’ official Twitter account is the best place to find the latest news about the “Fifty Shades” film. There's no release date for the movie yet.