Magnolia Pictures has acquired North American rights to Blackthorn, a Western about the final days of Butch Cassidy. Pic stars Sam Shepard, Stephen Rea, Eduardo Noriega and Nicolaj Coster-Waldau. Mateo Gil directed it from script by Miguel Barros. Ibon Cormenzana and Andres Santana produced. Pic premiered last week in downtown Manhattan and will debut in the Market at Cannes next month.