The Notorious Landlady is a 1962 American comedy mystery film starring Kim Novak, Jack Lemmon, and Fred Astaire.

[4][5] The film was directed by Richard Quine, with a script by Blake Edwards and Larry Gelbart based on the short story "The Notorious Tenant" by Margery Sharp.

When Ambruster hears Carly Hardwicke's name it seems familiar so he calls the research department to inquire if they have any information.

The next day, a Scotland Yard inspector, Oliphant, visits the embassy and convinces Gridley to spy on her as she has claimed his insurance and suspects that she killed him.

Carly returns while he is in her room, so he hides in her closet and overhears her talking to someone that the job needs to be done tonight and they might need two men to get it out of the house.

The fire makes Fleet Street headlines and Ambruster decides to transfer him to out of London.

He takes Carly to lunch, becomes smitten with her, and proclaims her innocence in the murder affair and decides not to transfer Gridley.

Gridley calls Oliphant to inform him that he will not spy on Carly anymore and when on the telephone they hear a gun shot.

After the inquest, Mrs. Brown attempts to blackmail Carly over a pawn ticket to a candelabra that Miles had stuffed with stolen jewels.

Gridley and Carly save the elderly lady as Ambruster and Oliphant arrive by helicopter and arrest Mrs. Brown.

Quine recruited writer Larry Gelbart to write a draft, and S. N. Behrman revised it.

The closing scenes set on the cliffs of Cornwall were filmed at Point Lobos State Natural Reserve in Carmel, California.

In a contemporary review for The New York Times, critic Bosley Crowther wrote that the film is "well worth the viewing of anybody who wants a nice breezy comedy concocted with a little standard mystery and suspense" and succeeds despite Novak's performance: "[T]he title role is played by Kim Novak, and that simply does not augur well.