The movie

Lamb
Noomi Rapace and Hilmir Snær Gudnason are farmers in a mist-enshrouded corner of Iceland, far from any civilizing influence. One day, one of their ewes gives birth to a lamb that is a strange hybrid creature—which the couple promptly adopt as their own child.
Description
‘Valdimar Johannsson’s wild and weird folkloric drama [is] laced with brooding genre elements that veer into horror and a vigorous jolt of WTF humour. The stunningly assured first feature will put the director on the map in ways not dissimilar to Robert Eggers’ “The Witch”. The two films share certain tonal elements, notably a steadily building dread conjured out of long silences, an eerie loneliness and a bold grasp of the dark mysteries of human-animal relations.’—David Rooney, The Hollywood Reporter