According to The Hollywood Reporter, Christopher Plummer has joined the cast of Warner Bros. Pictures' Il Mare, which Argentinian helmer Alejandro Agresti is directing. Plummer will play the father of Keanu Reeves' character in the film, which co-stars Sandra Bullock.

Il Mare is a remake of a Korean film, Siworae, which also was released under the title Il Mare.

A romantic comedy, Il Mare revolves around a lonely doctor (Bullock) and a frustrated architect (Reeves) who live in the same house, only two years apart. They fall in love via letters they exchange through a mailbox that mysteriously links the two of them.

Pulitzer Prize winner David Auburn wrote the script. Plummer's recent credits include Alexander and National Treasure.