Born in Sydney, Australia, in 1992 to a father who was a Tongan rugby legend, Billy Vunipola moved to Wales as a child before settling in England and gaining a scholarship to Harrow School.
After a spell at Wasps, he joined Saracens in 2013 and has never looked back. His England debut followed that same year, and he has already won 34 caps at the tender age of 24. After a disappointing World Cup in 2015, England - with Vunipola as the spearhead - swept to their first Grand Slam for thirteen years in the 2016 Six Nations.
Eddie Jones' rejuvenated side then recorded their first ever Test series in Australia, whitewashing the Wallabies 3-0, with Vunipola again very much to the fore, and then reclaimed their 2017 Six Nations crown.
Vunipola was selected in Warren Gatland's British & Irish Lions squad for the tour to New Zealand, but had to withdraw due to injury.