The film traces their tragic history, leading to their incarceration in the U.K.'s high-security mental health hospital Broadmoor, against the protests of their family.
Before Szczawno-Zdrój, the production team worked on location in the city of Wrocław.
British actresses Letitia Wright (Black Panther, Black Mirror, Death on the Nile, Hold Back the Stars) and Tamara Lawrence (On Chesil Beach, The Long Song) take the leading roles.
The Silent Twins is directed by Poland’s Agnieszka Smoczyńska. Her credits include two feature films Fugue and The Lure. The latter has received numerous awards at festivals in Poland and abroad, including a special award at the Sundance Festival in the United States and the Grand Jury Prize at the Chicago International Movies and Music Festival. (mk)