Callum Sebastian Nelmes Wilkie is an Australian rules footballer playing for and co-captain of St Kilda in the Australian Football League (AFL). A defender, he played in the South Australian National Football League (SANFL) and was overlooked at four national drafts before St Kilda selected him with pick 3 in the 2019 rookie draft. Wilkie debuted in the opening round of the 2019 season and is yet to miss an AFL match for St Kilda since his debut, playing 155 consecutive matches for the Saints.