Video: Niall Horan falls over and "apologises to golf" in fun-filled day with Rory McIlroy at Augusta
US Masters: One Direction star enjoys his day with world number one golfer
He's used to performing in front of scores of screaming fans but One Direction's Niall Horan admitted he was feeling nervous as he caddied for Golf's Number One Rory McIlroy.
And it showed as he managed to fall over with McIlroy's clubs live on air before hooking a tee shot on the ninth into the water.
The Irish pair linked up ahead of this weekend's US Masters tournament where McIlroy is hoping he will complete a career Grand Slam of Major wins.
The pop sensation landed the job as part of the annual Par 3 event, staged in the days before the US Masters gets underway.
Speaking before he took to the greens, Mullingar native Horan said he was "honoured" to lend a helping hand.
"It's a pretty big deal for the world number one and my fellow countryman to ask me to do this. It's pretty special," he said.
"It's quite a big tradition at Augusta for this to happen - so for me to be involved in such a big week for Rory is pretty much an honour."
The pop star certainly looked the part as he lugged McIlroy's clubs around the nine-hole course, dressed in all white overalls with the Augusta National logo emblazoned on his chest and a green hat to keep away the Georgia sunshine.
It was certainly a change from last year, when McIlroy's former girlfriend Caroline Wozniacki did the honours.
Horan carried out his duties with aplomb, despite having to compete with some zealous fans who demanded he pose for photos as he made his way around the course.
Elsewhere, golf legend Jack Nicklaus (75) rolled back the years to land an impressive hole-in-one on the fourth hole while Tiger Woods also took part in yesterday's Par 3 event for the first time since 2004.