The man in his 30s was found unresponsive after riding the coaster at Epic Universe on Wednesday, the Orange County Sheriff's Office in Orlando said in a statement to The Associated Press. He was taken to a hospital, where he was pronounced dead.
No further details were immediately released early Thursday.
Universal Orlando Resorts opened the park in May. It has five themed sections and a 500-room hotel.
It’s the first major, traditional theme park to open in Florida since 1999, when Universal Islands of Adventure debuted, though Universal opened a themed Orlando water park, Volcano Bay, in 2017.
The addition of Epic Universe brought the total number of parks at the Florida resort to four, including Universal Studios.