|Birth name||Viliami Vunipola|
|Date of birth||3 November 1992|
|Place of birth||Sydney, Australia|
|Height||1.88 m (6 ft 2 in)|
|Weight||130 kg (20 st 7 lb; 290 lb)|
|School||The Castle School|
|Notable relative(s)||Feʻao Vunipola (father)|
Mako Vunipola (brother)
|Rugby union career|
Viliami 'Billy' Vunipola (born 3 November 1992) is a professional rugby union player who plays at number 8 for Saracens in the English Premiership and for the England national team. Born in Australia to Tongan parents, he qualified for England through residency. He made his England debut in 2013 and has since won 36 caps.
Vunipola was born in Sydney in Australia to Tongan parents, but moved to Wales with his family as a child. He was educated at Porth Infants School and Griffithstown Junior School, and subsequently The Castle School in Thornbury, England. He started playing rugby in Wales, and played alongside his brother Mako for New Panteg RFC. He also played junior rugby for Thornbury RFC before being given a scholarship to attend Harrow School.
While at Harrow School, he joined the Wasps Academy. He made his senior team debut in 2011–12 season and played 30 matches over two seasons before leaving at the end of the 2012–2013 season.
After representing England at U18 and U20 level, Vunipola was called up to the England Saxons Squad in January 2013. He trained with the England Squad during the 2013 Six Nations Championship and made his senior England debut during the England tour of Argentina in the test against Argentina in Salta in June 2013, coming off the bench to score a try in England's 32–3 win. Earlier in the tour he played in an uncapped match against a Consur XV, and scored a hat-trick of tries in six minutes.
British and Irish Lions
In April 2017, Vunipola was selected as the one of the 41 British and Irish Lions to tour New Zealand in the summer alongside his brother Mako Vunipola. However due to an ongoing shoulder injury, he withdrew from the squad on 21 May 2017 and was replaced by England back-row teammate James Haskell.
- As of 11 August 2019 
|1||Argentina||Salta, Argentina||Estadio Padre Ernesto Martearena||2013 Tour of Argentina||8 June 2013||Win||32 – 3|
|2||Italy||London, England||Twickenham Stadium||2015 Six Nations||14 February 2015||Win||47 – 17|
|3||France||London, England||Twickenham Stadium||2015 Six Nations||25 March 2015||Win||55 – 35|
|4||Fiji||London, England||Twickenham Stadium||2015 Rugby World Cup||18 September 2015||Win||35 – 11|
|5||Australia||Sydney, Australia||Sydney Football Stadium||2016 Tour of Australia||25 June 2016||Win||44 – 40|
|6||Scotland||London, England||Twickenham Stadium||2017 Six Nations||11 March 2017||Win||61 – 21|
|7||Wales||London, England||Twickenham Stadium||2019 Rugby World Cup warm-up match||11 August 2019||Win||33 – 19|
Vunipola's father is former Tonga captain Fe'ao Vunipola and his mother is a Methodist minister in High Wycombe, Rev. Iesinga Vunipola (who is also a chaplain to the UK Tongan Community). He is the nephew of two other former international players, Manu and 'Elisi Vunipola who both represented Tonga in the 1990s. His brother, Mako Vunipola is his teammate and plays at prop for Saracens and England.
- "Billy Vunipola". Retrieved 14 September 2017.
- "England v Italy: Vunipola brothers Mako and Billy want Mum to see their Sunday best". Daily Telegraph. 7 March 2013.
- "Billy Vunipola hopes to confirm brotherly love for Saracens". thetimes.co.uk. Retrieved 19 January 2018.
- "Argentina 3–32 England". espn.co.uk. Retrieved 11 June 2013.
- Robert Kitson. "Chris Robshaw set to be confirmed as England captain for Australia clash | Sport". The Guardian. Retrieved 2 February 2014.
- "Billy Vunipola withdraws from Lions squad". British and Irish Lions. Retrieved 21 May 2017.
- "Billy Vunipola". 7 July 2019.