Photo: HBO

John Stahl played Richard Karstark in Game of Thrones.

John Stahl, an actor who starred inGame of Thronesand was prevalent within the Scottish theater, has died. He was 68.

Stahl’s agent, Amanda Fitzalan Howard, confirmed his death in a statement toDeadline. A cause of death was not given.

A representative for Stahl did not immediately respond to PEOPLE’s request for comment.

Stahl portrayed the role of Rickard Karstark for two seasons onGame of Thrones. The actor took over the role of Rickard for the HBO series' second and third seasons from fellow actor Steven Blount, who previously starred in the role.

Alastair Muir/Shutterstock

John Stahl as Maldonado in ‘Pedro, The Great Pretender’ play Royal Shakespeare Company

Before his time onGame of Thrones, Stahl was best known for his role in the Scottish soap opera,Take the High Road. He appeared on the show from 1982 until it concluded in 2003.

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Stahl was also a regular in the theater world, perThe Independent. The outlet reported that he appeared in performances at The Royal Shakespeare Company and The National Theatre.

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John Stahl as Colonel during the curtain call ‘Father Comes Home From the Wars’ play, Press Night, London, UK on Sep 22 2016

“We were fortunate to work with John onMary StuartandThe James Plays,” the organizationwroteon Twitter. “His passing is a huge loss to the industry, and he will be sorely missed. Our thoughts are with his loved ones.”

source: people.com