Thoroughly Modern Millie

An ambitious, witty young woman determined to work as a stenographer for a wealthy man in order to secure a modern marriage. She navigates flirtations and office politics with charm and pragmatism, chasing both independence and romance. Her plans collide with reality as affection and ambition pull in different directions.

An orphan who checks into the Priscilla Hotel and becomes Millie's naive but loyal friend. She approaches love with hopeful trust and a kind heart, ultimately capturing Trevor's affection. Her innocence highlights the vulnerabilities of the era's social world.

A handsome, self-absorbed office suitor who captivates Millie but ends up with Dorothy. He embodies the era's charm and vanity, learning that genuine connection can trump status. His journey moves from superficial interest to a more meaningful relationship.

A devil-may-care paperclip salesman who becomes Millie's love interest. Charismatic and quick-witted, he mixes affection with mischief and loyalty as he helps unravel the hotel’s secrets. His complicity in romance tests Millie's resolve and ideals.

The hotel's scheming head, a mastermind who runs kidnap-for-profit operations with Bun Foo and Ching Ho. Her ruthless exploitation of vulnerable girls drives the central danger of the plot. Her defeat marks the triumph of the protagonists.

An eccentric, wealthy widow who is the siblings' stepmother and organizer of the involved schemes. Her benevolent, theatrical presence helps resolve the chaos and restore balance. She embodies a generous, if flamboyant, influence on the young trio.

One of Mrs. Meers' loyal henchmen; a menacing but often comical presence in the kidnapping plot. He embodies the film's underworld danger alongside Ching Ho.

A quiet, calculating member of Mrs. Meers' criminal quartet who helps execute the scheme. His restraint hides a potentially dangerous partner in crime.

Head stenographer in the office who can see through some of the schemes and maintains order in the workplace. She keeps the workplace professional amid the chaos.