Platform 9¾ carries the Hogwarts Express in J.K. Rowling’s Harry Potter series.
The hidden platform is located at London’s King’s Cross railway station in the fictional world of the books. Students reach it by passing through the barrier between platforms 9 and 10. The Hogwarts Express then takes them from London to Hogsmeade station for the beginning of the school year.
Platform 9¾ is a fictional location, but King’s Cross has embraced it as a real-world Harry Potter attraction. A luggage trolley appears to pass through a wall near the station’s platforms, and visitors can pose with it beneath a sign. The attraction became a popular destination for readers and film fans.
The fraction is written as three-quarters, not as a conventional numbered platform. Because the actual tracks at King’s Cross did not originally match the story’s description exactly, the film production used a nearby location for platform scenes, while the station’s public attraction provides the best-known physical representation.