Korean-New Zealander Lydia Ko, the world's No.1 amateur golfer, announced that she will turn professional. The 16-year-old tweeted, "Made a monumental decision today..."
In an accompanying YouTube clip, Ko tells rugby player Israel Dagg that she will turn pro "right now, right this second."
She will play as a pro in the final event of the LPGA Tour at the end of November.
New Zealand Golf chief executive Dean Murphy said Ko was "was reluctant to hold a traditional press conference" because she "didn't want to make a big fuss about news that had already been reported in the media in recent weeks."
Ko has been the world's No.1 amateur for 131 weeks running, and is ranked No. 4 in the world overall.