Prince William celebrated his 42nd birthday by attending Taylor Swift's Eras Tour concert at Wembley Stadium in London with his children Prince George and Princess Charlotte. Taylor Swift performed with Hayley Williams, singing 'Castles Crumbling,' and the concert attracted numerous celebrities, including Tom Cruise and Greta Gerwig. Prince William was seen dancing to 'Shake It Off' with his children. The event also featured interactions between Tom Cruise and Swift's boyfriend Travis Kelce. Swift's London shows are expected to significantly boost the local economy, with nearly 640,000 attendees across eight dates.