'Keen Eddie' star Sienna Miller is to star as Heath Ledger female co-star in Lasse Hallstrom's
Casanova, according to Variety.
Miller joins Ledger in the romance about the famed seducer who learns the meaning of true love when he meets a woman immune to his charms.
Shooting is expected to start in August in Venice. Miller is to make her bigscreen debut in the forthcoming 'Alfie' remake.