The Welsh rugby-star-turned-NFL-hopeful wore a Swift t-shirt as he enjoyed her show at the Principality Stadium in Cardiff.
The 23-year-old recently joined the Kansas City Chiefs following his shock switch from rugby.
He is currently enjoying some time back home ahead of his first season in the NFL and Rees-Zammit went to see Swift during her Eras Tour.
The Welshman was joined at the Principality Stadium by his older brother, who is ironically called Taylor.
Swift’s relationship with Kelce took over the NFL last season, with the singer-songwriter in the stands for a number of Chiefs games – including the Super Bowl in Las Vegas.
Kelce has returned the favor, heading around the world to catch Swift’s shows in far-flung places such as Paris, Australia and Singapore.
Before heading back to Wales, meanwhile, Rees-Zammit enjoyed his first reps alongside the stars of the Super Bowl champions.
The former rugby wing has trained with the likes of Kelce and quarterback Patrick Mahomes as he looks to cement a career in the NFL.
