Ernest Hemingway on HBO

A number of actors have been added to the cast of HBO's biopic Hemingway & Gellhorn, starring Clive Owen and Nicole Kidman in "the tumultuous romance and subsequent marriage of literary master Ernest Hemingway (Owen) and up-and-coming war correspondent Martha Gellhorn (Kidman), following them through the Spanish Civil War and beyond," Deadline.com reported.

The cast now includes David Strathairn as John Dos Passos, Molly Parker as Hemingway's second wife, Pauline; Parker Posey as his fourth wife, Mary; Rodrigo Santoro as Zarra, a Spanish Loyalist and friend of Dos Passos; Lars Ulrich as Joris Ivens, the Dutch documentarian of The Spanish Earth; Santiago Cabrera as war photographer Robert Capa; Saverio Guerra as Hemingway's close friend Sidney Franklin; and Peter Coyote as editor Maxwell Perkins. Diane Baker will play Gellhorn's mother and Tony Shalhoub will play Koltsov, a Russian journalist.