One Direction’s lead singer Niall Horan was a smash hit caddying today for Rory McIlroy in the annual Par 3 Contest here at Augusta National.

McIlroy wound down in his goal for a career Grand Slam with Horan decked out in the Augusta National overalls as his caddy.

Horan was asked afterwards about the enthusiastic reception he received.

Rory McIlroy, Niall Horan & Tiger Woods. (Photo – Getty)

“There’s not 60,000 screaming girls here,” he said.

McIlroy admitted: “The deal was that if I make him hit a shot out there I’m going to have to get up on stage and sing with him at some point.”

But then the World No. 1 got his Par 3 Contest campaign off to an indifferent start when hooked a tee shot into the water.

“I apologize to golf,” Horan joked.

“I do perform to a lot of people but we were performing to their parents today! There was a lot of pressure.”

Rory McIlroy and Niall Horan.  (Photo – Getty)