The Twin Cities actor, 35, will co-star opposite Eva Green ("Casino Royale," "Dark Shadows") in "Penny Dreadful," an eight-episode series that will go into production this fall in London.
The series was created by John Logan, a three-time Oscar nominated screenwriter for "Gladiator," "The Aviator" and "Hugo."
"American Beauty" Oscar winner and "Skyfall" director Sam Mendes is one of the series' executive producers.
According to THR, Hartnett will play Ethan Chandler, a daring man not afraid of violence. He's described as "charming and brash but there are demons behind his eyes."
Green stars as Vanessa, described as the heroine of the series of who is "enigmatic with haunted eyes and utterly composed."
"Penny Dreadful" -- which is also described as psycho-sexual in nature -- will start shooting in October and air in the spring of 2014.
Hartnett's latest film, "Parts Per Billion," is in post-production.
“Parts Per Billion” surrounds three couples, who are each facing a toxic outbreak. Hartnett's co-star Rosario Dawson told Bring Me The News that the film was shot in Detroit, but Hartnett was commuter.
“He was coming back and forth from Minnesota the entire time when we were shooting,” Dawson said. “We were complaining about the cold in Detroit, and he was like, ‘Please.’”