Chay Crista Kerio Cullen (born 20 August 1985) is an Olympic Gold Medal-winning English field hockey player.

She has played club hockey for Leicester, based at the Stoneygate Preparatory School in Great Glen.

Cullen was appointed Member of the Order of the British Empire (MBE) in the 2017 New Year Honours for services to hockey.

She works as a Business Development Consultant for The Kennel Club and as Performance Director for Edwin Doran Sports Tours (edwindoran.com).

[8] Following her success at the 2016 Rio de Janeiro Olympic, Games, Crista Cullen has founded Tofauti which is a charity aimed at making sustained conservational change in Africa.