As family patriarch Logan Roy, esteemed Scottish actor Brian Cox was a terrifying and imposing presence on Succession. Everyone feared him from his children to the President of the United States, and apparently, that was the case in real life.

Fresh off her Emmy win for her Season 4 performance as Shiv Roy, Sarah Snook opened up about working with Cox, who could be just as intimidating as his character thanks to his well-documented “hangry” moments and to keep his co-workers on their toes.