Nike Never Hired Sydney Sweeney. The "Buy the Stock" Ad Was AI.
Three AI-generated fake ads put Sydney Sweeney in Nike branding this month ... all timed to the week Nike got kicked from the S&P 100. Nike has no Sweeney deal. Fact-checkers ran the images through a detection tool. Results: 99.9% AI.
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Someone put Sydney Sweeney in a Nike ad this month. Three versions circulated on social media. Nike never hired her.
The fake ads were stock-market commentary. On September 4, S&P Global confirmed Nike would be removed from the S&P 100 index on September 21, ending an 18-year run. Per Fortune, the stock had lost roughly 78 percent of its peak value, with the company's market cap falling from $264 billion in 2021 to around $57 billion.
At a glance
- The fake
- Three AI-generated Nike ads using Sydney Sweeney's likeness circulated September 7-8, 2026
- The trigger
- Nike removed from S&P 100 on September 21, 2026, ending an 18-year run
- AI detection
- Hive Moderation: 99.9%, 99.7%, 96.8% AI-generated across three images
- Nike response
- No partnership with Sweeney; no public statement about the fakes
By September 7, the memes arrived. The @dennishegstad account on X posted a fake Nike ad featuring an AI-generated image of Sweeney with the slogan "Buy the stock. Just do it." The original post carried a "Made with AI" label, per the Lead Stories fact check. The @wallstmemes account followed on September 8 with its own version, listing her as a "Nike Athlete."
A third variant, from @ProtestOnX, modified an image from Sydney Sweeney's American Eagle campaign, replacing bare feet with Nike shoes. One version used the slogan "Great jeans look perfect in Nikes."
Lead Stories tested all three images with Hive Moderation's AI detection tool. The scores: 99.9 percent AI-generated, 99.7 percent, and 96.8 percent. Yahoo News confirmed the same results. Nike has no announced partnership with Sweeney. Searches of the company's newsroom and press release databases returned nothing. Nike made no public statement about the fake ads.
The timing is specific. These were not fake ads for a shady crypto scheme or a knockoff supplement. They were financial commentary on Nike's index removal, using Sweeney's face because she is, at this moment, the most discussed commercial presence in American advertising. "Buy the stock" replaces "just do it" by design: the slogan graft works only because her name now reads as advertising itself.
This is a category of AI ad problem that predates the regulatory conversations about it. For years, the concern was AI-generated celebrity endorsements selling real products without consent. These fakes were not selling anything. They were editorial commentary packaged as brand creative, and they spread because the format looks credible enough to travel before anyone checks.
Nike's stock and its S&P 100 membership are gone regardless. Sweeney's face attached to the story, even fictionally, says more about where her personal brand sits right now than it does about Nike.
