You do not change a winning team;the Romy Schneider/Karl Boehm partnership proved highly successful in the legendary "Sissi" which became one of the biggest blockbusters in fifties Europa and spawned two sequels (Romy turned down a hefty sum to make a fourth episode) So here they are again,but their numerous fans have got to be patient :it takes 48 minutes before they meet.
"Kitty Und Die Große Welt" is pleasant harmless stuff ,in the tradition of Schneider's very early roles;she was 16 (and not 18 ,as we are told in this movie)and portrays not an empress but a musician 's daughter ,a musician who plays in the fanfare which welcomes the ministers of the foreign affairs who come for an international conference in Geneva .
Kitty is a manicurist who ,by chance ,meets the English minister ("you could be my father")and becomes a prey to the tabloids ;to protect her ,the politician sends his nephew (Boehm) who,of course ,is going to fall for her.They go on a stroll by the banks of Genova Lake and enjoy cheese fondue (there's a similar scene in an inn in the second installment of the Sissi Saga).
Meanwhile ,the uncle,who has never a penny in his pocket ,discovers the bistros ,he takes the bus as humble people do ;the best scene takes place on the lake when the boy claims his due and the distinguished English has to row the boat ashore.
This is a simple comedy,but one that might possess considerable appeal for fans of Sissi .For those who like Schneider's later career,they'd better move on.As for me,I like Romy in any movie.