Margarita “Rita” Mamun (Russian: Маргарита Мамун; born 1 November 1995 in Moscow, Russia) is a Russian-Bangladeshi individual rhythmic gymnast.
She is the two-time (2015, 2014) World All-around silver medalist, the 2015 European Games All-around silver medalist, the 2016 European Championships All-around silver medalist, three-time (2015, 2014, 2013) Grand Prix Final All-around champion and a three-time (2011–2013) Russian National All-around Champion. She is the current Record Holder under the 20-point judging system with the highest All-around total of 77.150 points; which she scored at the 2016 Baku World Cup.
Mamun was born in Moscow, Russia to a Bengali father and Russian mother. Her father, Abdullah Al Mamun, has a master’s degree in marine engineering, while her mother, Anna, is a former rhythmic gymnast. She has one younger brother named Filipp Al Mamun.
As a junior, Mamun competed in a number of international tournaments. She competed at the 2005 Miss Valentine Cup in Tartu, Estonia. She is coached by former rhythmic world champion Amina Zaripova. Mamun briefly competed for Bangladesh but returned to representing Russia as a senior.
Mamun competed at the 2011 International Tournament of Calais where she won gold in the All-around and in hoop, clubs and ribbon final. She made her senior international breakthrough at the 2011 World Cup in Montreal, Canada where she won the bronze medal in all-around and gold in ball finals ahead of Liubov Charkashyna. In 2012, she competed at the 2012 Moscow Grand Prix where she finished 9th in all-around. At the Diriugina World Cup in Kiev, Mamun won the bronze medal in hoop, ball and ribbon final. She competed in the senior international division at the 2012 Sofia World Cup and won the all-around gold. She finished 4th in all-around at the Tashkent World Cup. She and teammate Daria Dmitrieva then competed at the senior 2012 Aeon Cup in Japan and won the team gold medal.