Kieran Culkin on why his edgy ‘Succession’ persona sometimes follows him off-screen

Kieran Culkin has found a defining role playing Roman Roy, the snarkiest of the siblings on HBO’s “Succession.” Culkin tells KCRW about acting from an early age, facing his fears while fulfilling a dream as host of “Saturday Night Live,” and how he sometimes finds it hard to turn off that very snarky Roman Roy persona.