Jane Seymour's film debut.
Every time a poppy is seen someone dies, beginning with the photographer giving poppies to Grand Duke Ferdinand at the start of the film.
The band marching though Brighton is the Band of the Irish Guards (formed in 1900), as evidenced by the blue plumes in their bearskins and the 4-button groupings on their tunics.
The last film of Cecil Parker
The original Broadway production of "Oh, What a Lovely War" opened at the Broadhurst Theater in New York on September 30, 1964, ran for 125 performances and was nominated for the 1965 Tony Award for the Best Musical.