Ruan Pienaar (born 10 March 1984 in Bloemfontein) is a South African rugby union player who plays either as a scrum-half or as a fly-half for the Cheetahs in Pro14 rugby and the Free State Cheetahs in the Currie Cup.He is the son of former Springbok fullback Gysie Pienaar.
Ruan is regarded as a very skilful rugby player.
Besides being able to pass well, he can kick with both feet, and his vision and running style moved former Springbok coach Jake White to compare him with Australian fly-half Stephen Larkham.Pienaar has been part of u19 (2003), u21 (2005) and senior IRB World Cup (2007) winning squads.