Margarita Mamun
Margarita "Rita" Mamun (born November 1, 1995 in Moscow, Russia) is a retired Russian rhythmic gymnast. She won a gold medal in the individual all-around competition at the 2016 Rio Olympics. She has won fourteen World Championships medals, including two all-around silver medals in 2014 and 2015. Mamun starred in the documentary film "Over the Limit."