Steven Moffat is adapting Audrey Niffenegger's novel "The Time Traveler's Wife" for HBO.

No casting has been announced for the romantic-drama series.

The book was previously made into a 2009 film starring Eric Bana as Henry, a librarian with a genetic disorder that causes him to unpredictably time travel, and Rachel McAdams as Clare, the woman he loves.

The former "Doctor Who" writer and producer said in a press release Tuesday that he read and fell in love with the book many years ago.

"In fact, I wrote a Doctor Who episode called 'The Girl in the Fireplace' as a direct response to it," he said.

"When, in her next novel, Audrey had a character watching that very episode, I realized she was probably on to me. All these years later, the chance to adapt the novel itself, is a dream come true."

"The brave new world of long-form television is now ready for this kind of depth and complexity. It's a story of happy ever after -- but not necessarily in that order."

Moffat is also known for co-creating and writing the popular "Sherlock" TV movies, which aired on the BBC and PBS.

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He and Mark Gatiss, his collaborator from that series, lately have been working on a new BBC drama based on Bram Stoker's "Dracula."

Photo credit: Gage Skidmore