Instagram/Jesse Armstrong & Georgie TV Succession's Jesse Armstrong to keynote Banff World Media Festival, debut film Mountainhead starring Steve Carell. April 30, 2026 AceShowbiz - Succession creator Jesse Armstrong is set to deliver the keynote address at the upcoming Banff World Media Festival, scheduled for June 14 to 17. The acclaimed multiple Emmy Award-winning writer and producer will also showcase his directorial debut, the HBO film Mountainhead, starring Steve Carell. Mountainhead is a drama focusing on billionaire friends navigating a global financial crisis.