Marian Joyce Prado Rivera (born 1997) is a Bolivian model and beauty pageant titleholder who won Miss Bolivia 2018. She represented Bolivia at the Miss Universe 2018 pageant. Prado was stripped of her Miss Santa Cruz and Miss Bolivia crowns for 'breach of contract', when she confirmed she was pregnant in April 2019.
Prado-Rivera lives in Santa Cruz, Bolivia. She was previously awarding as Miss Tourism Bolivia in 2015. She is professional model and tourism ambassador under the Promociones Gloria, Miss Bolivia Organization. On June 24, 2018, she won Miss Bolivia 2018 and she represented her country at the Miss Universe 2018.