Marianela Nuñez was born in Buenos Aires and began dancing at the age of three. When she was six she began training at the Teatro Colón Ballet School, joining the Teatro Colón company aged 14. She joined The Royal Ballet Upper School in 1997 and joined the Company in 1998, promoted to Principal in 2002. She has performed all the leading roles in the classical, dramatic and contemporary repertory, including in works by Frederick Ashton, George Balanchine, John Cranko, William Forsythe, Jiří Kylián, Kenneth MacMillan, Wayne McGregor, Ashley Page, Jerome Robbins, Liam Scarlett, Glen Tetley, Will Tuckett, Antony Tudor and Christopher Wheeldon.
Nuñez’s awards include Best Female Dancer at the 2005 and 2012 Critics’ Circle National Dance Awards. She received the 2013 Olivier Award for Outstanding Achievement in Dance. She has appeared as a guest artist with companies including American Ballet Theatre, Vienna State Opera Ballet, Australian Ballet, La Scala, Milan, Ballet Estable del Teatro Colón and Teatro Argentino de La Plata.