PORTRUSH, Northern Ireland — Rory McIlroy gave the home crowds exactly what they craved on Saturday: He used the traditional third-round “moving day’’ to make a move up the leaderboard. McIlroy, who began the day at 3-under par, seven shots behind leader Scottie Scheffler, activated the huge Portrush crowds with a third-round 5-under-par 66.

Rory McIlroy stared at his card behind the 18th green and smiled the smile of a golfer who knew he’d had a day to remember at the British Open.

Here's what to know about McIlroy's roots, from his hometown and upbringing, to his young golf career before he emerged as one of the best players in the world. McIlroy was born in Holywood, County Down, Northern Ireland in 1989. His father was also from Holywood, while his mother was from Lurgan, County Armagh.

By the time Rory McIlroy finished his first practice round for the British Open at Royal Portrush, a big crowd that weathered rain and sunshine was waiting to see him finish.