For years, John Krasinski was best known as the charming and sarcastic Jim Halpert from The Office (and being Emily Blunt’s husband, of course). His comic timing, awkward glances at the camera and lovable personality made him one of television’s most iconic sitcom characters. However, Krasinski surprised audiences when he stepped into the intense and physically demanding role of Jack Ryan, transforming himself into a believable CIA analyst and action hero. The actor recently reflected on this dramatic career shift while discussing Prime Video’s Jack Ryan: Ghost War. Krasinski explained how he made the huge leap so believable.