No single image did more to define the ideal of the "Gibson Girl" than That evening her engagement was announced by Charles Dana Gibson. First published in the pages of Life magazine, Gibson's illustrations became a sensation in the late 19th and early 20th centuries, shaping American ideas of beauty and modern womanhood. The exact date and medium of this particular work remain uncertain, but its impact is clear: it helped launch the Gibson Girl as both a fashion icon and a symbol of social change.

The drawing was so popular that it was widely reproduced, inspiring imitations and even parodies across the Atlantic. At the heart of the scene is a moment of transformation: a young woman, surrounded by a circle of friends and family, sits radiant and composed as the news of her engagement ripples through the room. Gibson captures the subtle drama with his trademark pen-and-ink line—note the turned heads, the flutter of fans, the knowing glances exchanged among the women. The central figure's upright posture and calm expression signal her new status, while the crowd's mixture of curiosity and admiration reveals the social weight of the announcement.

Unlike the more sentimental treatments of engagement by artists like James Tissot, Gibson's approach is witty and sharp, highlighting the rituals and expectations of upper-class society. As with many of Gibson's works, That evening her engagement was announced was likely created for publication rather than for a private patron or gallery. Its widespread reproduction in magazines and prints helped cement Gibson's reputation as the leading illustrator of his era, and the piece remains a touchstone for scholars studying gender and social customs of the Gilded Age. Today, original drawings by Charles Dana Gibson are held in major collections such as the Library of Congress and the Smithsonian, though the precise whereabouts of this specific work are not always clear.

Its enduring popularity lies in its ability to capture both the elegance and the irony of its time.