Sonny Bill Williams has been reunited with Charlie Line, the boy he gave his Rugby World Cup winners medal to after the 14-year-old ran onto the field following last year's final.

The All Blacks sevens star posted a photo with Line during the London Sevens at Twickenham overnight, the same ground the two met in December.

Following the All Blacks' victory over Australia last year, Line broke onto the field to celebrate with Williams before security dragged him away.

Williams later said he felt sorry for the boy.

Advertisement

"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.

The All Black was later given a new medal at the World Rugby awards.

Williams posted a photo on his Twitter account with Line.

Williams was awarded the 2015 Panathlon International Fair Play Award to recognise his kind gesture.

This time around Williams did not have a winners medal to hand over with the All Blacks Sevens side knocked out of the main draw in the quarter-finals. They went onto win the plate final.