Roy Williams, who has led North Carolina to three NCAA titles in his 33 seasons as a college basketball head coach, is retiring, the school announced Thursday.

Williams has spent 18 seasons at UNC, going 485-163 while leading the Tar Heels to national titles in 2005, 2009 and 2017.  He led the Tar Heels to a 485-163 record, two other Final Fours, nine ACC regular-season championships and three ACC Tournament crowns.

The 70-year-old finished his head coaching career with a His 903 wins rank third all-time by a Division I head coach. Williams reached 900 wins in fewer games (1,161) and seasons (33) than any coach in NCAA history.

Williams was inducted in the Naismith Memorial Basketball Hall of Fame in 2007. He is the second-winningest coach in UNC history and third in Kansas history and is the only coach with 400 wins at two schools. His 77.4 winning percentage is the sixth-highest in NCAA history.

Williams led UNC and Kansas to nine Final Fours, fourth most all-time, and won national championships in 2005, 2009 and 2017. He finishes his career ranked second in NCAA Tournament wins (79), second in No. 1 seeds (13), second in games (105), third in NCAA Tournament winning percentage (.752) and tied for fourth in NCAA championships. He was 29-1 in the first round of the NCAA Tournament.

His eight wins over AP No. 1 ranked teams are an NCAA record and he ranks second in NCAA history in 30-win seasons (12) and tied for fourth in 20-win seasons (29).