The athlete shot dead Reeva Steencamp at his home in Pretoria on Valentine's Day 2013.
Originally, Pistorius was convicted of manslaughter, however this was upgraded to murder by South Africa's Supreme Court.
Following the sentencing hearing this morning, the six-time Paralympic gold medallist, dressed in a dark suit, was taken immediately to prison.
Under South African law, he must serve three years, after which he could be eligible for parole.
