During production there were a few proposed titles for the film, such as "Nothing Ventured," "Lawless," "Careless Cinderella" and "Careless." In view of the recent scandal involving a pregnant Lana Turner (whose marriage to the child's father, Stephen Crane, was not legal since his divorce from his first wife had yet to become final), those titles were rejected. Eventually, the studio settled on "Slightly Dangerous," an ironic title for a comedy that did ultimately serve the film (and Turner) very well.
According to a contemporary article in The Hollywood Reporter, Buster Keaton worked as an uncredited gag consultant and directed the blindfold sequence at the soda fountain. Director Wesley Ruggles had worked in silents with Keaton, and was himself a former Keystone Kop.
Lana Turner reprised her role the same year on a Lux Radio Theatre broadcast alongside Victor Mature on October 25, 1943.
The ad campaign for Slightly Dangerous (1943) had a life beyond pure promotional use. It featured Lana Turner in a black sequined gown from one of her most provocative photo shoots. It was these alluring shots from Slightly Dangerous that many World War II G.I.s requested for personal pin-ups.