"Lamb is a wonderfully strange film about parenthood."
— Siddhant Adlakha, IGN
"Lamb tugs at your heartstrings and sweeps you up in its melancholic mood."
— Meagan Navarro, Bloody Disgusting
"It's the sweetest, most touching waking nightmare you've ever experienced."
— David Fear, Rolling Stone
"Valdimar Jóhannsson's atmospheric folk horror/ deadpan comedy is both explosively funny and spine-tinglingly eerie."
— Nicholas Barber, BBC.com
"Lamb is a disturbing experience but also a highly original take on the anxieties of being a parent, a tale in which nature plus nurture yields a nightmare."
— David Rooney, The Hollywood Reporter
"'Lamb' is visually striking and moody, a well-made curiosity that you'll ponder days after you see it and wonder what the hell it means and why it affected you so."
— Randy Myers, San Jose Mercury News
"The movie's stark Nordic mood and obscure mystery are as coolly immersive as nearly anything on screen this year — and in the hammy world of supernatural horror, that ambiguity alone feels like a small, spooky gift."
— Leah Greenblatt, Entertainment Weekly
"Set on a remote farm in the Icelandic tundra that could center either a horror film or a children's fable, Valdimar Jóhannsson's debut feature - which is sorta both - is in certain ways unexplainable, and in others as straightforward as a family portrait."
— Robert Abele, TheWrap
"Ominous mountains look down upon the pastoral arena where this fantastical yet meditative rural drama plays out; it's a modern folk tale about the strange realities of life and death that such a closeness to nature affords."
— Katie Walsh, Los Angeles Times
"No matter how pure your intentions nor how real your pain, these ancient myths all teach us, debts always come due, and the chilling denouement of Jóhannsson’s dark, deliberate debut suggests that is what Lamb is: a modern-day take on some ancient, pre-Disneyfication fairy tale or a nursery rhyme with a sinister history encoded into its Spartan melody."
— Jessica Kiang, Variety