The film, scripted by Greg Latter, has been selected by the Hollywood Reporter as one of six not to be missed at this year's Festival.
BLACK BUTTERFLIES is directed by Dutch filmmaker Paula van der Oest and tells the tragic story of apartheid-era South African poet, Ingrid Jonker.
The film, which generated strong reviews at the Tribeca Film Festival, stars Carice van der Houten as Ingrid, alongside Liam Cunningham and Rutger Hauer.
The other films chosen were LA DELICATESSE, CITIES, GREAT HOPE SPRINGS, FRIENDS WITH KIDS and SOLO.
The Cannes Film Festival runs until 22nd May.