Nick Riewoldt is a former Australian Rules footballer, playing for St Kilda from 2001 to 2017, with eleven years as captain. He has won their best and fairest award a record-breaking six times and was selected five times for the All-Australian team.In 2015 he lost his sister Madeleine to a rare bone marrow condition, and started the not-for-profit organisation Maddie Riewoldt's Vision to raise money for research into bone marrow failure.