 Ferenc Molnár (I) (qv)s play opened in Budapest in 1911. English  versions were staged in London (as "Playing With Fire") and New York  (as "Where Ignorance Is Bliss") in 1913. But the definitive English  version, adapted by Philip Moeller (qv), opened in New York in  1924 and starred Alfred Lunt (qv) and Lynn Fontanne (qv).