In 2018, Pugh appeared in the action film The Commuter and played Cordelia to Anthony Hopkins's Leir of Britain in Richard Eyre's television film King Lear. Later that year, she portrayed Elizabeth de Burgh in the Netflix historical film Outlaw King (2018), which also stars Chris Pine as Robert the Bruce. Charles Bramesco of The Guardian found her "excellent despite her thankless role". She next appeared in a six-part miniseries adaptation of John le Carré's spy novel The Little Drummer Girl, in which she played an actress in the 1970s who becomes embroiled in an espionage plot. Although his review of the series was mixed, Richard Lawson of Vanity Fair wrote that Pugh was "terrific throughout, once again asserting her star-on-the-rise status" and that she "smartly mixes earthiness with sophistication, wisdom with naïveté. " She also appeared alongside Emilia Clarke, Tom Hiddleston and Gemma Chan in the short film Leading Lady Parts in support of the Time'sUp movement.