Harries will remain CEO until next year while a successor is sought.
His indie is best known for Netflix royal smashThe Crown.
A new CEO will likely be unveiled over the coming months.
Andy HarriesLeft Bank Pictures
Watch on Deadline
Sony Pictures Television international boss Wayne Garvie called Harries a television legend.
Other shows under Harries leadership includeWho is Erin Carter?, Three PinesandSitting in Limbo.
Harries has also been vocal in his support for the British industry.
