Isabella Rossellini and Italian actress Alba Rohrwacher are attached to star in helmer Saverio Costanzo's "
The Solitude of Prime Numbers," based on the bestselling Italo novel.
Costanzo burst on the fest circuit with his debut "Private," which took the 2004 Locarno Golden Leopard and many other prizes, followed by "In Memory of Myself," which went to Berlin. Costanzo will start shooting in October on "Solitude," which is mostly set in Turin and Piedmont.