Katie Nanna

Katie Nanna is a minor character from the film  Mary Poppins. She was portrayed by Else Lanchester, the real-life godmother of Karen Dotrice.

Background
At the beginning of the film, Katie Nanna is the nanny to Jane and Michael Banks. Just before the film begins, she had apparently taken the children on an outing to the park, and the children had, in her words, run away from her. The children apparently had a history of misbehavior, as they had run away 3 times in just that week, and she had grown fed up with it.

Katie Nanna does not appear after the opening of the film, but she is referenced during the initial search for the new nanny, where some of her background is revealed. When Mr. and Mrs. Banks discuss the failure of Katie Nanna, it is revealed that she was the last of six nannies hired over a course of four months, and that none of them had succeeded. Mrs. Banks had hired Katie Nanna, due to her solemn and cross appearance, which led Mrs. Banks to believe that she would be firm with the children.

Mary Poppins
As the film opens, she has packed her things and is preparing to leave, as she has chosen to resign. The Banks' family's two servants, Mrs. Brill and Ellen are shown to have differing opinions on the impending resignation. While Mrs. Brill is happy to see Katie Nanna leave, Ellen attempts to convince Katie Nanna to stay, as Ellen is usually tasked with child care in the absence of a nanny.

However, Katie Nanna's departure is delayed by the return of Mrs. Banks. While Mrs. Banks sings her introductory song, Sister Suffragette, Katie Nanna attempts to inform the oblivious Mrs. Banks of her coming departure. Mrs. Banks finally asks Katie Nanna where the children are. When Katie Nanna informs Winfred that they have gone missing, Mrs. Banks scolds her for allowing it to happen as it was the fourth time that week. Katie Nanna then asks Mrs. Banks for her wages, as she has chosen to resign rather than deal with the badly behaved children. Mrs. Banks tries to convince Katie Nanna to stay, citing that Mr. Banks had just gotten used to her. Nothing can convince Katie Nanna, and so she leaves, running into Mr. Banks as she enters her taxi.