Harry Potter actor Michael Gambon has joined Robert Mullan’s upcoming film Metanoia that will star David Tennant as renowned 20th century psychiatrist RD Laing.
The Laing biopic will also star Mad Men actress Elisabeth Moss and will begin filming in January of 2016.
RD Laing was famous for his radical approaches to treatment, including the use of the then-legal LSD as a treatment for psychosis and schizophrenia.