"Good to be back in the homeland. Going to be a great week hosted
by @McIlroyRory," Niall tweeted.
The pop star previously joined his pal Rory McIlroy as a caddie at
The Masters last year (15). The singer even got an opportunity to
tee off on one hole at Augusta, Georgia - and then he and Rory
posed for a picture with golfing legend Tiger Woods.