Beatrice Hastings assise features a seated woman with a thoughtful expression. She is dressed in a dark outfit, which contrasts with the lighter background. The colors are muted, creating a calm atmosphere around her.

The composition emphasizes her elongated features, a hallmark of Amedeo Modigliani's style. The painting showcases Modigliani's characteristic use of elongated forms and simplified shapes. Hastings' face is rendered with minimal detail, yet it conveys a sense of depth and personality. The background is abstract, allowing the viewer to focus on her figure.

The overall effect is both striking and intimate. Amedeo Modigliani painted this work around 1915, during a period when he was exploring portraiture. Hastings was a poet and a significant figure in Modigliani's life, often serving as his muse. The painting reflects the modernist movement's departure from realism, emphasizing emotional expression over precise representation.

Today, it is housed in the Museo Nacional de Bellas Artes in Buenos Aires, Argentina.