Lady Mary Elizabeth Peters, is a Northern Irish former athlete and athletics administrator. She is best known as the 1972 Olympic champion in the pentathlon, for which she won the BBC Sports Personality of the Year Award. Peters was named as Lady Companion of the Order of the Garter on 27 February 2019. She was installed in St. George's Chapel, the chapel of the Order, on Garter Day, 17 June.

The Order of the Companions of Honour is an order of the Commonwealth realms. It was founded on 4 June 1917 by King George V as a reward for outstanding achievements. It was founded on the same date as the Order of the British Empire.