#2. Marcus Smith (Harlequins)
Marcus became the second-youngest Premiership debutant in history, behind George Ford, when making his Harlequins bow against London Irish aged 18 years and 200 days in September 2017. The fly-half made 28 appearances for Harlequins in all competitions during the 2017/18 season scoring three tries on his way to 208 points. He was named as an apprentice in the England party for the Old Mutual Wealth series that autumn and continued in that role during the 2018 NatWest 6 Nations. He featured for the England XV side that beat the Barbarians 51-43 at Twickenham in May 2019, scoring 26 of those points in a stand-out performance.