A man from Sydney's northern beaches initially hung up on Oz Lotto officials who called him on Tuesday night to advise he was a joint winner of a $50 million jackpot.

Oz Lotto officials persisted, eventually keeping the Manly man on the line long enough to break the good news.

He was one of three winners to share in the $50 million prize, telling Oz Lotto officials he chose his numbers based on family birth dates and had a "feeling" he might win.

"Earlier today I thought I'd love to win," he said. "I was just thinking in my head driving along and lo and behold, I won. I can't believe it.



"When you rang before I thought it was a bit strange. But then I went and grabbed my ticket, then I checked my ticket and saw the numbers."