White Horse Pictures and Lionsgate will produce “Emperor,” based on the series of novels by Conn Iggulden about the young Julius Caesar and Brutus.

Producers are White Horse Pictures’ Nigel Sinclair, Hollywood Gang Productions’ Gianni Nunnari, Atmosphere Entertainment’s Mark Canton and Matt Jackson.

“Combining the sweep of ‘300’ with the intrigue of ‘Game of Thrones,’ this is the part of the story of the mighty Julius Caesar that nobody knows — his emergence alongside Brutus as young powerhouses in Rome, a fresh and contemporary retelling of their rivalries, passions and jealousies, captured in a movie with breath-taking action, spectacular visual effects and epic scope,” said Nunarri and Canton, who produced “300” and “300: Rise of an Empire.”

Caesar became Dictator of the Roman Republic in 49 B.C. after his victories in the Gallic Wars extended Rome’s territory. He was assassinated by Brutus in 44 B.C.

Executive producers are White Horse partner Guy East, William Broyles Jr., Tony To and Alex Brunner.

Broyles, Stephen Harrigan, Burr Steers and Ian Mackenzie Jeffers penned the script.

The news was first reported by Deadline Hollywood.