Split screen (video production) in the Russian silent film "The Queen of Spades" (1916), directed by Yakov Protazanov, where one screen depicts reality and the other a character's inner desires. This technique has been used to portray twins in such films as "Wonder Man" (1945), "The Dark Mirror" (1946), "The Parent Trap" (both the 1961 original and the 1998 remake), and "Adaptation" (2002). In the 1961 version of "The Parent Trap", conversations between the twins were simulated by filming the actress (Hayley Mills) as she stood at the left of the frame facing right, then filming her again, standing at the right and facing
The Rat Trap (who also played a supporting role), and Allan Wade. The production starred Robert Harris as Keld (an aspiring young playwright) and Joyce Kennedy as Sheila (a novelist, Keld's fiancée in Act I, his wife in the three subsequent acts). Strong support was given by Adrienne Allen as Ruby (an ambitious musical comedy actress), Mary Robson as Olive (Sheila's flatmate) and Clare Greet as Burrage (the laconic cook-housekeeper). Coward later wrote: 'My first serious play, "The Rat Trap", was produced at the Everyman Theatre while I was on the "Olympic" bound for New York, and so I never saw it...in spite