In the elaborate musical finale, Judy Garland is dancing with an uncredited Charles Walters, who would eventually become one of MGM's top directors and direct Judy herself in both Easter Parade (1948) and Summer Stock (1950).
This film was originally purchased by MGM as a dramatic vehicle for Lana Turner. After Turner dropped out due to a scheduling conflict, the film was re-tooled as a screwball comedy/musical for Judy Garland.
Judy Garland's naturally dark hair was lightened to a dark blond as a key part of her glamorous image change and transition into adult roles.
Actor Gil Stratton commented "MGM killed her, absolutely. All of us at Girl Crazy (1943) were on layoff for a month - on full salary - while she was doing retakes on 'Presenting Lily Mars' (1943). Two pictures at once. And that wasn't the only time they did that to her."