He was the oldest member of S Club 8. He starred in I Dream but did not appear in every episode due to studying for his GCSEs at the time of filming. After S Club 8 split in 2004, he joined dancing company TK Spin, who work at Pineapple Dance Studios in London. He left the company a year later.
He went on to Laine Theatre Arts where he trained for 3 years for a National Diploma in Musical Theatre Acting. In 2007, Renfree starred in Flashdance: The Musical, which ran for a year. As of 2009, he is part of the West End Production of We Will Rock You: The Musical he is currently a Swing.
Aaron was assistant choreographer and show director for the X Factor Live Tour 2009 and 2010 and also did some choreography for recording artist Little Boots. He has recently joined up with former S Club Junior members Frankie Sandford and Rochelle Wiseman, as a back up dancer for The Saturdays in multiple live shows.