"Because he's a bloke, all the other blokes absolutely love him, and quite rightfully," Mirren tells PEOPLE of her costar ...

Brian Geraghty & Sebastian Roché join HELLO! for an exclusive chat, and reveal what it's really like working with Harrison ...

Brandon Sklenar tells PEOPLE his reaction to the major bombshell about his character's wife, Alex, in the '1923' season 2 ...