New Zealand star Sonny Williams hands young fan his winners' medal following Rugby World Cup final victory over Australia 34-17

Sonny Bill Williams hugs young supporter Charlie Lines after All Blacks' historic World Cup win over Australia 34-17 on Saturday October 31 at Twickenham, London.

The 30-year-old New Zealand centre handed his winners' medal to one very excited young fan in the crowd.

''A young fella snuck onto the field somehow but when he was coming up to give me a hug, he got smoked by a security guard, full-on tackled him. He was only eight and the other fella was a big man so he was lucky he didn’t break his ribs or something,'' Williams explained about the encounter with Lines. ''I think the moment got the better of him but he was just so excited to get onto the field with the All Blacks. I just thought I'd make it a night to remember for him. Rather than have the medal hanging up at home, it's going to hanging around that young fella’s neck. He can tell that story for a long time to come.''

Williams then posted on his Instagram: ''Only takes one thing to change someone's life. Enjoy it Charlie bro.''

New Zealand have won the Rugby World Cup for the third time and will retain the Webb Ellis Cup.