 Shooting on location in New York City also added to Mackendrick ’ s anxieties . Exteriors were shot in the busiest , noisiest areas with crowds of young Tony Curtis fans occasionally breaking through police barriers . Mackendrick remembered , " We started shooting in Times Square at rush hour , and we had high @-@ powered actors and a camera crane and police help and all the rest of it , but we didn ’ t have any script . We knew where we were going vaguely , but that ’ s all " . 
