Nicole Kidman has been cast as Colin Firth's wife in ''
The Railway Man,'' replacing Rachel Weisz in the role.
''
The Railway Man,'' directed by Jonathan Teplitzy, is in pre-production to start shooting in April. A U.K.-Australian co-production backed by Lionsgate Intl., it's based on Eric Lomax's autobiography about his horrific experiences as a Japanese prisoner in World War II, and his remarkable reconciliation with one of his captors 30 years later.