"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."
"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