Background
Vunipola was born in Sydney, New South Wales, Australia to former Tongan captain Fe"ao Vunipola and Methodist Minister, Review Iesinga Vunipola (who is also Chaplain to the United Kingdom Tongan Community).
Vunipola was born in Sydney, New South Wales, Australia to former Tongan captain Fe"ao Vunipola and Methodist Minister, Review Iesinga Vunipola (who is also Chaplain to the United Kingdom Tongan Community).
After moving to Wales with his family as a child, he was educated at Griffithstown Junior School, and subsequently the Castle School in Thornbury, and played junior rugby for Thornbury Reconstruction Finance Corporation before winning a scholarship to attend Harrow School.
He plays at Back row for Saracens in the Aviva Premiership and England. He is the nephew of two other former international players, Manu and "Elisi Vunipola who both represented Tonga in the 1990s. London Wasps
While at Harrow School, Billy joined the London Wasps Academy.
He made his senior team debut in 2011-2012 season and played 30 matches over two seasons before leaving at the end of the 2012–2013 season.
Saracens
Vunipola signed a contract in January 2013 to move to Saracens at the end of the 2012-2013 Aviva Premiership. After representing England at U18 and U20 level, Billy was called up to the England Saxons Squad in January 2013.
Earlier in the tour he played in an un-capped match against a Consur XV, in this match he completed a hat-trick in six minutes. England Head Coach Stuart Lancaster selected Billy in his squad for the Autumn Internationals.
Billy Vunipola was named man of the match for the Scotland–England and England-Ireland and France-England matches in the 2016 Six Nations Championship.
† Full international cap not awarded for South American XV Test match.