Green joined Aston Villa at the age of nine and progressed through the club's academy. He made his club and Premier League debut on 13 March 2016, coming off the bench for Jordan Veretout in a 2–0 loss to Tottenham Hotspur. In doing so he became the fifth youngest player to ever represent the club, behind only Jimmy Brown, Rushian Hepburn-Murphy, Gareth Barry and Jonathan Bewers. Following Aston Villa's relegation the season before, Green was linked with a move to host of Premier League clubs but opted to sign a new three-year contract with The Villans in August 2016. Green made his first league start for the club at home against Preston in January 2017. He scored his first goal for Aston Villa against Norwich City on 19 August 2017.
After struggling with an injury that kept him out of much of the 2017–18 season, Green found it difficult to get into the Aston Villa first team and on 29 August 2018, he signed for Portsmouth on a season long loan, dropping down a division to League 1. He scored his first goal for Portsmouth in an EFL Trophy tie against Tottenham Hotspur Under 23s on 13 November 2018. On 5 January2019, Green scored a last minute winner as Portsmouth won 1–0 to upset EFL Championship leaders Norwich City FC in the FA Cup third round at Carrow Road. On 17 January 2019, Green was recalled from his loan spell.
Return to Aston Villa
In January 2019, Green was recalled to Aston Villa. Portsmouth manager Kenny Jackett said that he believed that new Villa coach Dean Smith wanted to increased the quota of homegrown players in the squad. He first appearance back was against Hull City in a 2–2 draw. Green scored the third goal in a stunning comeback against Sheffield United at Villa Park, Sheffield United had a 3–0 lead with only 18 minutes, plus injury time remaining - before Villa scored three goals in quick succession with Green scoring in injury time.
On 2 January 2020, Green joined Championship side Charlton Athletic on a loan until the end of the 2019/20 season. Green scored his first goal for Charlton in a 2–1 away defeat to Preston North End. On 25 June 2020, it was announced that Green would be released by Aston Villa, signing a contract extension with them to allow him to complete his loan spell at Charlton.
International career
Green has represented England up to Under 20 level.
