"I am beyond excited to be taking on this iconic and inspirational show," Lesslie said in a statement. "As a lifelong devotee, I know that the possibilities of Battlestar Galactica's world are infinite and that each iteration has raised the bar for epic and intelligent sci-fi storytelling."
"Battlestar Galactica" began life as a 1978 film. A spin-off series launched the same year. A second series ran from 2004 to 2009 and followed a group of humans on the verge of extinction amid a robot war.