Rosannagh “Rosie” MacLennan (born August 28, 1988) is a Canadian trampoline gymnast. She is the current reigning Olympic champion in the individual trampoline event as well as the reigning Pan American Games champion in the individual. MacLennan was the Canadian National Women’s champion in 2005, 2009 and 2011. MacLennan was the World Champion in the synchro event with Karen Cockburn, winning gold in 2007. She has also won five silver and four bronze medals in World Championship competition in both the individual and synchro events.