"A perfect vehicle for Hawkins’s reliably winning screen presence."
— The Observer
"A historical detective story that carries the kick of a true-life 'Da Vinci Code.'"
— Owen Gleiberman, Variety
"Thanks to Frears’ touch, and Hawkins’ unrelenting and rousing performance, it’s hard not to get won over by The Lost King."
— Collider
"Stephen Frears’s direction is agile, sly and entertaining as ever. Like all his films, it’s innately subversive of authority, sympathetic to the outsider, relishing peculiarity."
— David Sexton, New Statesman
"The 81-year-old Frears, who has enjoyed an illustrious career, once again achieves excellent work, the performances are impeccable, and this story of a lost King proves to be a riveting yarn."
— David Stratton, The Australian
"A warm, wryly amusing account of a real-life story, a crowd-pleasing portrait of the kind of enthusiastic amateur who proves enduringly popular with British cinema; and, indeed, British audiences."
— Wendy Ide, Screen International