Lamb is the first film where Noomi Rapace speaks in Icelandic, a language she learned while living in Iceland as a child.
In preparation for her role, Noomi Rapace spent time on an Icelandic farm and even learned how to help a sheep birth a lamb.
Highest grossing motion picture in the history of Icelandic cinema, as of 2021, earning over million dollars on the first weekend alone. This also makes this film the most attended Icelandic film shown in U.S. theaters ever (again on the first weekend alone), and this despite being pitted against such big-name blockbusters like the James Bond franchise, which premiered in USA theaters on that same weekend.
Official submission of Iceland for the 'Best International Feature Film' category of the 94th Academy Awards in 2022.
The book Ingvar reads to Ada, is "Sagan af Dimmalimm" ("The Story of Dimmalimm"), written by Gudmundur Thorsteinsson (aka Muggur).