 During one scene, Audrey Hepburn (qv) and  William Holden (I) (qv) compare Frankenstein to  _My Fair Lady (1964)_ (qv), the latter of course being the film  Audrey would soon star in. _Charade (1963)_ (qv), Hepburns next  produced film, also contains a reference to  _My Fair Lady (1964)_ (qv).