"It’s undeniably an absolute blast."
— Wendy Ide, Screen International
"The cast [...] is top drawer, delivering performances as crisp as well-starched linen."
— Leslie Felperin, Financial Times
"Any time spent with actors as skilled as Colman and Buckley is time enjoyably spent."
— Laura Venning, Empire Magazine
"[A] witty, joyously written piece of forgotten history, scripted by comedian Jonny Sweet."
— Clarisse Loughrey, The Independent
"It has a gloriously antic spirit and it sends you out on a high -- no small thing these days."
— Sandra Hall, Sydney Morning Herald
"Wicked Little Letters may revolve around a mysterious author, but a talented cast and crew put their signature all over it."
— Stephen Saito, The Moveable Feast
"The Oscar winner and Oscar nominee, respectively, play warring neighbors in a tiny English village in the 1920s, and there is a glorious gusto to their very funny performances."
— Esther Zuckerman, Vanity Fair
"In Sharrock’s hands, 'Wicked Little Letters' is an entertaining account of what feels like a primitive form of today’s online flame wars, where people take sides as commenters openly disparage one another."
— Peter Debruge, Variety
"The camera looks up to Colman and Buckley in adulation, often allowing their features to seize the entire frame. Here’s a film that understands perfectly well that the two of them are all we need to enjoy ourselves."
— Clarisse Loughrey, Independent (UK)