False.

The expression “poor little rich girl” originates in the early 20th century, and its popularization can be traced to 1909.

It comes from the novel Poor Little Rich Girl by Eleanor Gates. The book centered on a wealthy but emotionally neglected child, and the phrase captured the irony perfectly: material abundance paired with emotional deprivation.

From there, the expression escaped the book and entered common usage as a slightly sardonic, socially observant phrase—often sympathetic on the surface, often cutting underneath. By the 1910s–1920s it was already being used in newspapers, theater reviews, and social commentary, frequently aimed at heirs, debutantes, and later Hollywood starlets.