100 Team GB contenders for London 2012: Crista Cullen
Cullen has twice been selected in the World Hockey All-Star Team after consistently good performances on the international stage. The Leicester defender has won more than 150 international caps and shows no sign of slowing down; she was the joint-top scorer at this year's Champions Trophy in Argentina with five goals, helping Great Britain reach the final.
Hailed as a "defensive powerhouse", full-back Cullen is actually more noticeable for her pivotal role in penalty corners, from which she has the capability to score game-changing goals. She made her England debut against Scotland in 2003 and has won bronze medals with her country at the two most recent Commonwealth Games, as well as the 2011 European Championships.
Cullen grew up in Kenya, where she took up hockey at the age of nine on soil pitches. She didn't play the game on astro-turf until she went for under-15 trials with Leicestershire.