This news signals that the likes of Ian McShane, Ray Winston, Johnny Harris, Eddie Marsan and Brian Gleeson are unlikely to return, though we're certainly counting none of them out given the change in Frost's status.
Cedric Nicolas-Troyan (previously visual effects supervisor on Snow White And The Huntsman) is handling directorial chores for this one, which finds Chris Hemsworth's title character in the years before he first met Snow White, and his early encounters with Charlize Theron's beguiling, dangerous Ravenna. Emily Blunt (Edge Of Tomorrow) and Jessica Chastain (Zero Dark Thirty) are also set for the film, which will be out on 22 April next year.
Smith, an accomplished actress and singer, was last seen in The Harry Hill Movie (2013) and has TV Movies Flack and The C-Word set to hit screens this year. Brydon is on screens this week, with a small role in Kenneth Branagh's (Thor) Cinderella, plus a part in HBO's political comedy The Brink. And Roach, who shared the screen with Frost in Cuban Fury (2014), is part of police comedy drama No Offence.