Caslick is a dual international having represented her country at the Australian Youth Olympic Festival and 2013 Rugby Sevens World Cup as well as playing for Touch Football Australia at both age-grade and open levels. She was named in World Rugby's 2014–15 Team of the Season after another stellar season and one of four players nominated for the 2015 World Sevens Player of the Year. Charlotte was also voted player of the tournament in the Australian Nationals. Representative Honours include Touch Football Australia, Australian Youth Olympic Festival (2013) and Queensland. She was a member of Australia's team at the 2016 Olympics, defeating New Zealand in the final to win the inaugural Olympic gold medal in the sport.