The 'Anna Frey Is Brock Purdy' meme took social media by storm during the 2023-2024 NFL season when fans noticed a striking physical resemblance between the San Francisco 49ers quarterback and the young tennis prodigy Anna Frey. What started as a niche observation on TikTok quickly evolved into a massive internet conspiracy theory suggesting they were long-lost siblings or even the same person. Anna Frey leaned into the joke, frequently posting content referencing her 'brother' during the Niners' playoff run and Super Bowl appearance. The meme is typically used to highlight uncanny lookalikes or to joke about Purdy's 'secret' side career in tennis, showcasing the lighthearted intersection of professional sports and social media celebrity culture.