Louis Rees-Zammit (born 2 February 2001)is a Welsh rugby union rugby player who plays on the wing for Gloucester in the English Premiership.
Having started his youth career with the Cardiff Blues, he moved to Hartpury College and from there to the academy of Gloucester Rugby. He broke into the Gloucester senior team in the 2019–20 season, becoming the club's youngest ever Premiership player. He scored two tries against Worcester during a 36–3 win in December 2019, and later the same month became the first 18-year-old to score a hat-trick of tries during a 33–26 loss to Northampton.
He received the Premiership Player of the Month Award in December 2019.
On 13 January 2020, Rees-Zammit signed his first professional contract with Gloucester, thus promoted to the senior squad from the 2020-21 season.
Rees-Zammit has represented Wales at under-18 level. He received his first call up to the senior Wales squad by coach Wayne Pivac on 15 January 2020 for the 2020 Six Nations Championship. He made his debut for Wales from off the bench in an international friendly against France held at Stade de France in Paris, France.