Los Angeles, CA – January 15: Vesper Ruck, Sarah Snook, Alexander Skarsgård Brian Cox, Kieran Culkin, Nicholas Braun, Matthew Macfadyen, J. Smith-Cameron and the cast of “Succession,” wins an Emmy for Outstanding Drama Series at the 75th Primetime Emmy Awards at Peacock Theater in Los Angeles, CA, Monday, Jan. 15, 2024. (Dania Maxwell / Los Angeles Times via Getty Images)

During a recent appearance on Times Radio, Sarah Snook revealed that her Succession costar, Brian Cox, went into “diabetic rage[s]” behind the scenes that were sometimes “terrifying.”

“He has a habit of sometimes going into a false — or could it be real, who knows? — diabetic rage, where he’ll go [growl] all of a sudden,” the Beanie Bubble actor said. “I think part of it’s a little of trying to just jolt the energy of the set and rustle a few feathers, get it going and moving faster. The quality of his voice can be very terrifying sometimes, for sure. Thunderous.”

Cox suffers from type 2 diabetes. Another one of his costars on the show, Kieran Culkin, previously said he would “scream” if he was hungry while on set. “Well, yeah I do get hangry because I’m diabetic,” the Troy actor said on ITV’s This Morning, in response to Culkin’s comments.