Rianna Lauren Jarrett (born 5 July 1994) is a Republic of Ireland womens international footballer who plays for Brighton & Hove Albion of the English FA WSL. A prolific forward, Jarrett was the WNL Player of the Season in 2018.
In 2010, Jarrett was a member of the Republic of Ireland U-17 squad who were runners-up in the 2010 UEFA Womens Under-17 Championship and quarter-finalists in the 2010 FIFA U-17 Womens World Cup.
Jarrett won her first cap for the senior Republic of Ireland national team in March 2016, in a 1–1 draw with Italy at the 2016 Cyprus Cup. She substituted in for Megan Connolly, but nine minutes later suffered an anterior cruciate ligament injury. It was the third such injury of Jarretts young career, following occasions in April 2013 and January 2015.
In May 2018, Ireland coach Colin Bell recalled Jarrett to the squad for a FIFA Womens World Cup qualifying fixture against Norway. Ireland were eliminated after losing in Stavanger but Jarrett won her second cap as an 83rd-minute substitute.