Geek Chic is a fashion trend that originated in the mid-2000s, characterized by the appropriation of stereotypical "geek" or "nerd" clothing and accessories into a stylish, often ironic, ensemble. The aesthetic is defined by its embrace of scholastic and intellectual signifiers, most notably the oversized, black horn-rimmed glasses that became its signature accessory.

The trend represented a significant cultural shift where elements once associated with being "uncool" or socially awkward were recontextualized as fashionable. Geek Chic is not about being an actual geek in terms of interests, but about adopting the visual style of the archetype as a style statement.

The rise of Geek Chic in the 2000s was fueled by a cultural re-evaluation of "geekiness." As tech entrepreneurs like Steve Jobs and Mark Zuckerberg became cultural icons, and media franchises like Lord of the Rings and Harry Potter dominated the box office, the "geek" archetype shifted from a marginalized figure to a symbol of success and intelligence.

The fashion trend itself was heavily influenced and popularized by the character Seth Cohen (played by Adam Brody) on the television show The O.C. (2003–2007). His character made the nerdy, indie-music-loving archetype a desirable romantic lead and a style icon for the millennial generation. The look was further legitimized in high fashion by designers like Marc Jacobs, who incorporated preppy and scholastic elements into his collections. By the late 2000s and early 2010s, the style had trickled down into mainstream retail, with brands like J.Crew, under the direction of Jenna Lyons (herself an icon of the aesthetic), promoting the look.

The Geek Chic look is a curated combination of preppy , vintage , and stereotypically nerdy elements.

The fashion often incorporates scholastic and slightly formal pieces. Sweater vests, argyle sweaters, and cardigans are staples, typically layered over plaid or gingham button-down shirts. Trousers are often cropped, high-waisted, or in a "high-water" style. For a more casual look, a graphic t-shirt featuring a comic book character, a scientific diagram, or a witty slogan is paired with simple jeans.

Accessories are the most defining aspect of the aesthetic. The single most iconic item is a pair of large, thick, black horn-rimmed glasses, which were often worn with non-prescription lenses or with the lenses popped out entirely as a pure fashion statement. Other key accessories include bow ties, suspenders, and sometimes a satchel or leather messenger bag.